1 00:00:00,000 --> 00:00:02,240 Right now, somewhere in a sprawling call center 2 00:00:02,240 --> 00:00:04,599 in the Philippines, there's a worker speaking 3 00:00:04,599 --> 00:00:06,400 into a headset, right? They're trying to help 4 00:00:06,400 --> 00:00:08,320 a customer troubleshoot a router or something. 5 00:00:08,439 --> 00:00:10,720 Right. But the voice coming out of the other 6 00:00:10,720 --> 00:00:12,859 end of that line, the voice the customer actually 7 00:00:12,859 --> 00:00:15,740 hears, it belongs to a white American from the 8 00:00:15,740 --> 00:00:19,179 Midwest who literally does not exist. It's completely 9 00:00:19,179 --> 00:00:22,199 fabricated. Exactly. The worker's natural accent, 10 00:00:22,359 --> 00:00:25,359 their cadence, the actual physical reality of 11 00:00:25,359 --> 00:00:27,739 their vocal tract, it's all being captured and 12 00:00:27,739 --> 00:00:30,219 then just stripped away. It's mathematically 13 00:00:30,219 --> 00:00:33,740 replaced in real time by this synthetic digital 14 00:00:33,740 --> 00:00:36,939 shield. Which is just a profound manipulation 15 00:00:36,939 --> 00:00:39,000 of human interaction when you really stop to 16 00:00:39,000 --> 00:00:41,429 think about it. And what's wild here is that 17 00:00:41,429 --> 00:00:43,530 the technology doing this isn't some distant 18 00:00:43,530 --> 00:00:45,429 science fiction concept. Now it's happening right 19 00:00:45,429 --> 00:00:48,609 now. Right. It is a highly funded, rapidly scaling 20 00:00:48,609 --> 00:00:51,149 reality. And it's fundamentally altering how 21 00:00:51,149 --> 00:00:54,570 we even define human speech. So today we are 22 00:00:54,570 --> 00:00:57,850 plunging into this terrifying but honestly totally 23 00:00:57,850 --> 00:01:00,549 fascinating world of machine voices. We're doing 24 00:01:00,549 --> 00:01:03,909 a massive deep dive into Edward B. Kang's meticulous 25 00:01:03,909 --> 00:01:06,519 and Frankly, paradigm -shifting book. It's called 26 00:01:06,519 --> 00:01:09,739 Machine Voices, a Sonic Study of Artificial Intelligence. 27 00:01:09,959 --> 00:01:12,400 A really incredible piece of research. Oh, absolutely. 28 00:01:12,980 --> 00:01:15,060 So our mission today is to pull apart this text 29 00:01:15,060 --> 00:01:18,159 concept by concept for you. We are going to explore 30 00:01:18,159 --> 00:01:21,519 the hidden, often invisible, intersection between 31 00:01:21,519 --> 00:01:24,299 our human voices and the AI industry that is 32 00:01:24,299 --> 00:01:26,879 currently, well, devouring them. Devouring is 33 00:01:26,879 --> 00:01:28,959 the right word. And Kang's core premise here 34 00:01:28,959 --> 00:01:31,620 is incredibly compelling, because he starts with 35 00:01:31,620 --> 00:01:33,620 a contradiction. Like, I want you to just... 36 00:01:33,439 --> 00:01:35,540 Think about how we traditionally view the human 37 00:01:35,540 --> 00:01:38,299 voice. The French film theorist Michel Chian 38 00:01:38,299 --> 00:01:41,260 famously called the voice a strange object because 39 00:01:41,260 --> 00:01:43,840 it's intimate, right? It's elusive. You can't 40 00:01:43,840 --> 00:01:45,780 just hold it in your hand. Exactly. You can't 41 00:01:45,780 --> 00:01:48,359 touch it. It's deeply tied to our psychology, 42 00:01:48,659 --> 00:01:51,219 our physical bodies, our personal histories. 43 00:01:51,560 --> 00:01:53,700 It's the thing that makes you you. I mean, if 44 00:01:53,700 --> 00:01:55,620 you call your mother from an unknown number and 45 00:01:55,620 --> 00:01:57,459 just say one single word, she instantly knows 46 00:01:57,459 --> 00:02:01,049 it's you. Yes. But Kang's book exposes how the 47 00:02:01,049 --> 00:02:03,769 AI industry looks at this strange object and 48 00:02:03,769 --> 00:02:06,370 sees a completely different puzzle. They definitely 49 00:02:06,370 --> 00:02:08,569 don't see the intimacy. Not at all. They don't 50 00:02:08,569 --> 00:02:10,849 want the voice to be elusive or mysterious. They 51 00:02:10,849 --> 00:02:13,469 are actively trying to transform it into something 52 00:02:13,469 --> 00:02:16,750 manageable, something measurable, and above all 53 00:02:16,750 --> 00:02:19,710 else, something sellable. Right. And to pull 54 00:02:19,710 --> 00:02:21,830 off that transformation, to turn this intimate 55 00:02:21,830 --> 00:02:25,860 human breath into a literal commodity, Kang argues 56 00:02:25,860 --> 00:02:29,500 the AI industry relies on three derivative rationales. 57 00:02:29,659 --> 00:02:31,840 Yes. These are basically the foundational myths 58 00:02:31,840 --> 00:02:34,379 of the entire voice AI enterprise. Let's lay 59 00:02:34,379 --> 00:02:36,599 these out because they kind of dictate everything 60 00:02:36,599 --> 00:02:38,500 we're going to talk about today. What's the first 61 00:02:38,500 --> 00:02:42,300 one? So the first rationale is the belief that 62 00:02:42,300 --> 00:02:44,879 voices are knowable because they are mechanical. 63 00:02:45,479 --> 00:02:48,159 Meaning, if we just build the right machine, 64 00:02:48,240 --> 00:02:50,240 we can completely understand the human voice. 65 00:02:50,400 --> 00:02:53,500 OK. And the second? The second is kind of the 66 00:02:53,500 --> 00:02:57,199 inverse of that. It's that voices are inherently 67 00:02:57,199 --> 00:02:59,800 mechanical and therefore they are knowable. Like 68 00:02:59,800 --> 00:03:02,840 we aren't ghosts in a shell. We are just fleshy 69 00:03:02,840 --> 00:03:05,699 instruments producing acoustic data. Which naturally 70 00:03:05,699 --> 00:03:08,919 leads to the inevitable third step. Right. The 71 00:03:08,919 --> 00:03:11,919 ultimate conclusion. Because voices are both 72 00:03:11,919 --> 00:03:15,120 knowable and mechanical, they are replicable. 73 00:03:15,520 --> 00:03:17,840 If it's just a mechanism, we can just build a 74 00:03:17,840 --> 00:03:20,689 digital version of that exact mechanism. OK, 75 00:03:20,689 --> 00:03:22,750 let me pause here and push back on that a bit, 76 00:03:22,909 --> 00:03:25,370 or at least bring this down to earth for the 77 00:03:25,370 --> 00:03:27,370 person listening right now. Sure. Because if 78 00:03:27,370 --> 00:03:29,610 you are listening to this on a smartphone, the 79 00:03:29,610 --> 00:03:32,210 microphone you just used an hour ago to ask for 80 00:03:32,210 --> 00:03:34,689 driving directions has already mapped the physical 81 00:03:34,689 --> 00:03:37,110 geometry of your throat. Oh, absolutely. When 82 00:03:37,110 --> 00:03:40,349 you say, hey Siri, or use voice to text, you 83 00:03:40,349 --> 00:03:43,009 might think you're just using a handy tool. But 84 00:03:43,009 --> 00:03:46,210 under the surface, your specific laughs, your 85 00:03:46,210 --> 00:03:49,159 pauses, that unique timbre you have, It's all 86 00:03:49,159 --> 00:03:51,879 being mined as raw data to feed those exact three 87 00:03:51,879 --> 00:03:55,159 rationales. That is the exact reality Kang is 88 00:03:55,159 --> 00:03:57,919 analyzing here. We are moving from a paradigm 89 00:03:57,919 --> 00:04:01,439 where the voice is this phenomenon of human experience, 90 00:04:01,580 --> 00:04:04,860 this messy biological reality, to a paradigm 91 00:04:04,860 --> 00:04:07,319 where the voice is literally just a system of 92 00:04:07,319 --> 00:04:10,099 mechanisms. But getting to this point where an 93 00:04:10,099 --> 00:04:13,099 AI can clone a voice or an algorithm claims it 94 00:04:13,099 --> 00:04:14,819 can tell if you're a good employee just by the 95 00:04:14,819 --> 00:04:17,240 sound of your pitch, that obviously didn't happen 96 00:04:17,240 --> 00:04:19,829 overnight. No, it took decades of trial and error. 97 00:04:20,250 --> 00:04:22,870 Right. Kang traces this back to the very first 98 00:04:22,870 --> 00:04:25,569 incredibly clumsy attempts to visually capture 99 00:04:25,569 --> 00:04:28,970 the human voice. And that brings up this historical 100 00:04:28,970 --> 00:04:31,350 anecdote from the text that I think perfectly 101 00:04:31,350 --> 00:04:34,430 sets the stage for the modern AI obsession. You 102 00:04:34,430 --> 00:04:36,750 brought this up when we were prepping. Jacques 103 00:04:36,750 --> 00:04:40,449 de Volcanson's mechanical duck. Yes, the digesting 104 00:04:40,449 --> 00:04:43,550 duck. It's such a brilliant historical parallel 105 00:04:43,550 --> 00:04:46,189 that Kang uses. Set the scene for us. So we're 106 00:04:46,189 --> 00:04:48,930 talking about the 18th century. Vaucanson built 107 00:04:48,930 --> 00:04:52,550 this elaborate copper automaton duck. It could 108 00:04:52,550 --> 00:04:54,850 flap its wings, drink water, and supposedly, 109 00:04:55,110 --> 00:04:58,209 this was the big draw, it could eat grain, digest 110 00:04:58,209 --> 00:05:01,009 it, and then excrete it. And people were just 111 00:05:01,009 --> 00:05:03,569 mesmerized by this? Oh, completely. Okay. They 112 00:05:03,569 --> 00:05:05,589 thought he had mechanically replicated biology. 113 00:05:05,750 --> 00:05:08,170 They thought he built a digestive tract. They 114 00:05:08,170 --> 00:05:09,870 thought it was a total fraud, right? Completely 115 00:05:09,870 --> 00:05:12,149 fake. The grain went into one hidden compartment, 116 00:05:12,410 --> 00:05:15,490 and this preloaded fake excrement was released 117 00:05:15,490 --> 00:05:17,899 from a... Totally different compartment. Wow. 118 00:05:18,060 --> 00:05:19,600 Yeah, the machine wasn't digesting anything at 119 00:05:19,600 --> 00:05:21,579 all It was just mimicking the surface effect 120 00:05:21,579 --> 00:05:24,079 of digestion. Okay, so how does Kang connect 121 00:05:24,079 --> 00:05:27,879 this copper duck to modern AI? He uses it to 122 00:05:27,879 --> 00:05:30,639 ask a really critical question when a computer 123 00:05:30,639 --> 00:05:33,699 mimics a human voice perfectly has it actually 124 00:05:33,699 --> 00:05:35,939 replicated human intelligence or human biology 125 00:05:35,939 --> 00:05:40,060 or Is it just another mechanical duck? You know, 126 00:05:40,060 --> 00:05:42,480 is it just producing a highly convincing surface 127 00:05:42,480 --> 00:05:44,759 effect without any of the underlying reality? 128 00:05:44,939 --> 00:05:47,199 That is a phenomenal setup. Because the quest 129 00:05:47,199 --> 00:05:49,879 to map the underlying reality of the voice takes 130 00:05:49,879 --> 00:05:52,180 us straight into the FBI's historical obsession 131 00:05:52,180 --> 00:05:55,220 with something called voice prints. Yes, chapter 132 00:05:55,220 --> 00:05:57,779 one. Right. This is where the modern tech industry 133 00:05:57,779 --> 00:05:59,680 really started to grapple with mapping sound 134 00:05:59,680 --> 00:06:03,060 to identity. So we are in the 1960s and 70s, 135 00:06:03,180 --> 00:06:05,100 the FBI is desperate for new forensic tools. 136 00:06:05,540 --> 00:06:09,079 And there's this massive push to use speech spectrograms 137 00:06:09,079 --> 00:06:11,620 to identify criminals. Let's break down what 138 00:06:11,620 --> 00:06:13,420 a spectrogram actually is, just so we're all 139 00:06:13,420 --> 00:06:15,160 on the same page, because the mechanism here 140 00:06:15,160 --> 00:06:19,100 is crucial. Yeah, go for it. So, sound in the 141 00:06:19,100 --> 00:06:21,540 air is just changes in pressure, right? It's 142 00:06:21,540 --> 00:06:24,079 a wave. If you look at a standard audio file 143 00:06:24,079 --> 00:06:26,120 on your computer, you see a waveform. It just 144 00:06:26,120 --> 00:06:28,639 shows how loud the sound is over time. Right, 145 00:06:28,660 --> 00:06:30,399 it gets fatter when it's loud, skinnier when 146 00:06:30,399 --> 00:06:32,620 it's quiet, like a heart monitor. Exactly, like 147 00:06:32,620 --> 00:06:35,120 a heart monitor. But a waveform doesn't tell 148 00:06:35,120 --> 00:06:38,420 you what the sound actually is. A spectrogram 149 00:06:38,420 --> 00:06:42,100 is a much more complex visual map. It takes an 150 00:06:42,100 --> 00:06:44,920 audio signal and plots three things simultaneously. 151 00:06:45,680 --> 00:06:48,519 Time is on the horizontal axis, frequency or 152 00:06:48,519 --> 00:06:51,379 pitch is on the vertical axis, and the amplitude, 153 00:06:51,819 --> 00:06:55,000 the loudness, is represented by how dark or brightly 154 00:06:55,000 --> 00:06:58,319 colored the specific marks are. So it's basically 155 00:06:58,319 --> 00:07:00,000 taking a slice of audio and running it through 156 00:07:00,000 --> 00:07:02,560 a prism, right? Breaking it down into all its 157 00:07:02,560 --> 00:07:04,860 individual frequencies so you can literally look 158 00:07:04,860 --> 00:07:07,290 at the physical shape of a word. That's a really 159 00:07:07,290 --> 00:07:10,430 great way to visualize it. And in the 60s, this 160 00:07:10,430 --> 00:07:12,990 self -proclaimed expert named Lawrence Kursta 161 00:07:12,990 --> 00:07:15,769 looked at these visual shapes and made a massive, 162 00:07:15,889 --> 00:07:19,050 totally audacious claim. What did he claim? He 163 00:07:19,050 --> 00:07:21,649 heavily promoted the idea that a visual spectrogram 164 00:07:21,649 --> 00:07:24,649 of a voice was just as unique and just as reliable 165 00:07:24,649 --> 00:07:27,129 as a human fingerprint. Hence the term voice 166 00:07:27,129 --> 00:07:29,990 print. I mean, it's great marketing. It was brilliant 167 00:07:29,990 --> 00:07:32,660 marketing. Through these experiments he designed 168 00:07:32,660 --> 00:07:36,339 himself, Kirsta claimed an astounding 99 % accuracy 169 00:07:36,339 --> 00:07:38,740 rate in identifying speakers just by looking 170 00:07:38,740 --> 00:07:42,279 at these visual charts. 99 %? Yeah. And he was 171 00:07:42,279 --> 00:07:44,800 so confident, he set up his own company, VoicePrint 172 00:07:44,800 --> 00:07:47,699 Laboratories, and began offering a two -week 173 00:07:47,699 --> 00:07:50,259 training program to certify law enforcement officers 174 00:07:50,259 --> 00:07:52,680 as experts. OK, I have to stop you there. Two 175 00:07:52,680 --> 00:07:55,839 weeks? He thought he could train a cop to look 176 00:07:55,839 --> 00:07:58,899 at a complex frequency chart for two weeks? and 177 00:07:58,899 --> 00:08:01,860 achieve 99 % accuracy in identifying a human 178 00:08:01,860 --> 00:08:04,399 being. Yes. With enough certainty to literally 179 00:08:04,399 --> 00:08:07,279 send them to prison. He did. And for a while, 180 00:08:07,560 --> 00:08:09,600 courts were actually accepting this evidence. 181 00:08:09,740 --> 00:08:12,399 Juries were buying it. That's terrifying. It 182 00:08:12,399 --> 00:08:14,800 really is. But this is where the conflict between 183 00:08:14,800 --> 00:08:17,680 biology and machinery really explodes. Defense 184 00:08:17,680 --> 00:08:20,120 attorneys start pushing back hard. The scientific 185 00:08:20,120 --> 00:08:22,319 community started raising their eyebrows. It 186 00:08:22,319 --> 00:08:25,180 became a complete courtroom nightmare. So what 187 00:08:25,180 --> 00:08:27,800 happened? Well, in 1976, the FBI finally said, 188 00:08:27,819 --> 00:08:29,779 look, we need to know if this is real science. 189 00:08:30,079 --> 00:08:32,019 So they commissioned the National Academy of 190 00:08:32,019 --> 00:08:35,379 Sciences to investigate it. Right, the NAS. And 191 00:08:35,379 --> 00:08:37,179 they put together this heavy hitting committee. 192 00:08:37,620 --> 00:08:40,080 We're talking physicists, linguists, audiologists, 193 00:08:40,299 --> 00:08:43,080 lawyers. They spend years looking at Krista's 194 00:08:43,080 --> 00:08:46,220 methods. And in 1979, they release a massive 195 00:08:46,220 --> 00:08:48,720 report that essentially torches Krista's entire 196 00:08:48,720 --> 00:08:52,000 premise right down to the ground. And why they 197 00:08:52,000 --> 00:08:54,440 torched it is arguably the most important part 198 00:08:54,440 --> 00:08:57,549 of this whole story. Exactly. The committee pointed 199 00:08:57,549 --> 00:09:00,090 out a fundamental flaw in the metaphor of the 200 00:09:00,090 --> 00:09:02,529 voice print itself. Walk us through that flaw. 201 00:09:03,029 --> 00:09:04,809 Well, think about a traditional fingerprint. 202 00:09:05,230 --> 00:09:08,070 It's a direct graphical representation of human 203 00:09:08,070 --> 00:09:10,929 anatomy. It is the actual physical ridges on 204 00:09:10,929 --> 00:09:13,850 your skin pressing onto a surface. It's a direct 205 00:09:13,850 --> 00:09:16,809 one -to -one impression. But a voiceogram isn't 206 00:09:16,809 --> 00:09:20,710 that at all. It's indirect. Yes. It is an indirect 207 00:09:20,710 --> 00:09:24,590 representation of an incredibly complex, multi 208 00:09:24,590 --> 00:09:27,190 -layered process. Because when you speak, the 209 00:09:27,190 --> 00:09:29,769 resulting sound isn't just a static imprint of 210 00:09:29,769 --> 00:09:32,549 your vocal cords. It's heavily affected by your 211 00:09:32,549 --> 00:09:34,429 physiological state. Like, do you have a cold? 212 00:09:34,970 --> 00:09:37,370 It's affected by your psychological state. Are 213 00:09:37,370 --> 00:09:40,269 you stressed out during an interrogation? It's 214 00:09:40,269 --> 00:09:42,470 affected by the acoustic environment you're standing 215 00:09:42,470 --> 00:09:45,370 in. Is the room echoey? Is there traffic outside, 216 00:09:45,450 --> 00:09:48,309 right? Exactly. And crucially, it is profoundly 217 00:09:48,309 --> 00:09:50,830 altered by the mechanical equipment used to record 218 00:09:50,830 --> 00:09:53,289 it. A cheap mic sounds different than an expensive 219 00:09:53,289 --> 00:09:56,250 one. You simply cannot draw a straight objective 220 00:09:56,250 --> 00:09:59,549 line from a visual squiggle on a page to a person's 221 00:09:59,549 --> 00:10:02,149 unique biological identity. So treating a voice 222 00:10:02,149 --> 00:10:04,809 like a fingerprint is essentially like trying 223 00:10:04,809 --> 00:10:07,889 to read someone's soul through a footprint. But 224 00:10:07,889 --> 00:10:10,629 the footprint changes shape depending on if the 225 00:10:10,629 --> 00:10:13,149 person is tired or angry or carrying a heavy 226 00:10:13,149 --> 00:10:15,990 backpack or walking through mud. Right. And Kirsten 227 00:10:15,990 --> 00:10:17,830 was just looking at the mud and saying, yep, 228 00:10:18,009 --> 00:10:20,250 that's definitely Steve. That is a phenomenal 229 00:10:20,250 --> 00:10:22,529 analogy. The footprint is constantly shifting. 230 00:10:23,230 --> 00:10:25,549 And Kang uses this historical failure to highlight 231 00:10:25,549 --> 00:10:27,429 a critical tension in how we build technology 232 00:10:27,429 --> 00:10:30,830 today. He talks about the clash between disciplinary 233 00:10:30,830 --> 00:10:34,029 objectivity and mechanical objectivity. OK, let's 234 00:10:34,029 --> 00:10:36,590 break those down. What is disciplinary objectivity? 235 00:10:37,379 --> 00:10:39,820 Disciplinary objectivity is when we trust an 236 00:10:39,820 --> 00:10:42,159 expert's trained eye. We trust the doctor reading 237 00:10:42,159 --> 00:10:44,460 the x -ray, or we trust Kirsta because he says, 238 00:10:44,519 --> 00:10:46,899 hey, I have the discipline and the experience 239 00:10:46,899 --> 00:10:50,120 to see these hidden patterns. It relies completely 240 00:10:50,120 --> 00:10:53,559 on human judgment. Got it. And mechanical objectivity. 241 00:10:54,039 --> 00:10:57,259 Mechanical objectivity is when we trust a machine's 242 00:10:57,259 --> 00:10:59,980 rules. We build an algorithm to remove the human 243 00:10:59,980 --> 00:11:02,299 bias entirely. Let the machine do the measuring. 244 00:11:02,519 --> 00:11:04,840 So Kirste was basically trying to launder his 245 00:11:04,840 --> 00:11:07,340 disciplinary objectivity, his own gut feeling, 246 00:11:07,779 --> 00:11:09,600 through the mechanical objectivity of a fancy 247 00:11:09,600 --> 00:11:12,120 machine? That's exactly what he was doing. He 248 00:11:12,120 --> 00:11:14,759 claimed his method was a mechanical, infallible 249 00:11:14,759 --> 00:11:17,919 rule. But in reality, reading a spectrogram completely 250 00:11:17,919 --> 00:11:20,960 relied on his subjective, highly contested expertise. 251 00:11:21,200 --> 00:11:22,840 Because nobody else could do it. Right. When 252 00:11:22,840 --> 00:11:24,980 the wider scientific community tried to replicate 253 00:11:24,980 --> 00:11:28,279 his 99 % accuracy without him in the room guiding 254 00:11:28,279 --> 00:11:31,139 them, they couldn't do it. The scientific consensus 255 00:11:31,139 --> 00:11:33,639 wasn't just weak, it was literally non -existent. 256 00:11:33,960 --> 00:11:36,179 So if I'm understanding this correctly, Lawrence 257 00:11:36,179 --> 00:11:38,340 Kirste wasn't actually building a mechanical 258 00:11:38,340 --> 00:11:41,580 rule, he was building a machine that just outsourced 259 00:11:41,580 --> 00:11:43,639 the final judgment right back to his own eyeballs. 260 00:11:44,120 --> 00:11:46,419 And exactly. And because he was the only one 261 00:11:46,419 --> 00:11:49,620 who quote unquote knew how to read it, he became 262 00:11:49,620 --> 00:11:53,120 the bottleneck. I mean the 1979 report explicitly 263 00:11:53,120 --> 00:11:55,759 stated that voice identification was closer to 264 00:11:55,759 --> 00:11:58,460 an empirical art than a fully developed science. 265 00:11:58,649 --> 00:12:01,330 Yes, and they recommended a complete halt to 266 00:12:01,330 --> 00:12:03,950 forensic use until someone could establish a 267 00:12:03,950 --> 00:12:06,309 basic underlying scientific understanding of 268 00:12:06,309 --> 00:12:09,549 the human voice. But, and this is where Kang's 269 00:12:09,549 --> 00:12:13,129 book takes a pretty wild turn, the industry didn't 270 00:12:13,129 --> 00:12:15,870 stop. They didn't retreat to the biology labs 271 00:12:15,870 --> 00:12:18,669 to map the vocal tract. No, they didn't. They 272 00:12:18,669 --> 00:12:21,690 just ignored the biologists entirely. They bypassed 273 00:12:21,690 --> 00:12:24,700 them completely. Yes. They hit a scientific roadblock, 274 00:12:24,840 --> 00:12:27,460 so they just reframed the entire problem as an 275 00:12:27,460 --> 00:12:29,960 engineering and statistical challenge. If they 276 00:12:29,960 --> 00:12:32,179 couldn't understand the biology of why voices 277 00:12:32,179 --> 00:12:35,259 correlate to identity, they decided they just 278 00:12:35,259 --> 00:12:38,179 didn't need to. Right. They shifted to deep learning 279 00:12:38,179 --> 00:12:40,700 and what we now call automatic speaker recognition, 280 00:12:40,960 --> 00:12:43,700 or ASR. Okay, hold on. Break that down for me. 281 00:12:43,820 --> 00:12:46,139 How do you go from failing to map the biology 282 00:12:46,139 --> 00:12:49,080 to just solving it with math? I mean, they don't 283 00:12:49,080 --> 00:12:51,039 know the rules of the voice. How do they build 284 00:12:51,039 --> 00:12:53,549 the system? They did it by changing the paradigm 285 00:12:53,549 --> 00:12:56,970 from causation to correlation. The new logic 286 00:12:56,970 --> 00:12:59,350 became, look, we don't need a grand scientific 287 00:12:59,350 --> 00:13:02,330 theory if we can just feed a computer a massive 288 00:13:02,330 --> 00:13:05,230 amount of data and let it find statistical patterns 289 00:13:05,230 --> 00:13:07,450 on its own. They replaced the need for causal 290 00:13:07,450 --> 00:13:10,250 scientific theory with sheer brute force scale. 291 00:13:10,470 --> 00:13:13,250 Which leads us to these massive data sets. And 292 00:13:13,250 --> 00:13:15,870 Kang talks about Vox Celeb. I read that section 293 00:13:15,870 --> 00:13:18,529 and I was just stunned. Because if you want to 294 00:13:18,529 --> 00:13:20,990 train a highly precise audio recognition system, 295 00:13:21,210 --> 00:13:24,250 You'd think you would bring people into soundproof 296 00:13:24,250 --> 00:13:26,830 anechoic chambers, right? You'd think so. Use 297 00:13:26,830 --> 00:13:29,970 thousand -dollar microphones, get perfect, pristine 298 00:13:29,970 --> 00:13:32,190 audio samples. That's what Kirsta would have 299 00:13:32,190 --> 00:13:34,110 wanted. But that's the old scientific method. 300 00:13:34,450 --> 00:13:37,070 That's the old scientific method. But Vox Celeb 301 00:13:37,070 --> 00:13:39,370 didn't do that at all. They just wrote a script 302 00:13:39,370 --> 00:13:42,070 to scrape millions of utterances from YouTube 303 00:13:42,070 --> 00:13:45,129 celebrity interview videos. Yep. Red carpet interviews, 304 00:13:45,330 --> 00:13:46,970 late night talk shows, whatever they could find. 305 00:13:47,159 --> 00:13:49,379 It's full of background noise, people laughing, 306 00:13:49,620 --> 00:13:51,240 traffic, people talking over each other. It's 307 00:13:51,240 --> 00:13:53,799 an absolute mess. And that mess is exactly what 308 00:13:53,799 --> 00:13:56,580 makes modern neural networks so powerful. Deep 309 00:13:56,580 --> 00:13:59,000 learning models actually want that noise. They 310 00:13:59,000 --> 00:14:02,139 treat it as valuable variations. Really? Why? 311 00:14:02,879 --> 00:14:05,080 Because in machine learning, if you train an 312 00:14:05,080 --> 00:14:08,320 AI on perfect, pristine studio audio, it becomes 313 00:14:08,320 --> 00:14:12,100 what they call overfit. Overfit. OK, what does 314 00:14:12,100 --> 00:14:15,059 that mean? It means the second it hears a voice 315 00:14:15,059 --> 00:14:17,379 on a crappy cell phone connection in the real 316 00:14:17,379 --> 00:14:19,759 world, it fails. It doesn't know how to handle 317 00:14:19,759 --> 00:14:22,879 the imperfections. But by feeding it the chaotic, 318 00:14:23,379 --> 00:14:26,000 noisy YouTube data, the neural network learns 319 00:14:26,000 --> 00:14:28,980 to mathematically separate the underlying voice 320 00:14:28,980 --> 00:14:32,179 from the noise. It finds a pattern that actually 321 00:14:32,179 --> 00:14:36,840 survives the chaos. Oh, wow. Okay, so the machine 322 00:14:36,840 --> 00:14:39,080 is finding the pattern itself. Does that mean 323 00:14:39,080 --> 00:14:41,000 we finally achieve mechanical objectivity? Did 324 00:14:41,000 --> 00:14:43,320 we finally get the subjective human bias out 325 00:14:43,320 --> 00:14:47,080 of the loop? No. And this is one of Kang's darkest 326 00:14:47,080 --> 00:14:49,299 ironies in the entire book. We didn't solve the 327 00:14:49,299 --> 00:14:52,340 problem of human subjectivity at all. We just 328 00:14:52,340 --> 00:14:55,580 buried it deeper under layers of math. How so? 329 00:14:56,059 --> 00:14:58,799 Well, Kang compares Kirsta's highly subjective 330 00:14:58,799 --> 00:15:01,480 two -week training program in the 60s to the 331 00:15:01,480 --> 00:15:04,360 modern era of ASR. Any point specifically to 332 00:15:04,360 --> 00:15:07,539 a modern system called BatFox. Right. Batvox 333 00:15:07,539 --> 00:15:09,919 is this massive, widely used ASR system today. 334 00:15:10,059 --> 00:15:12,539 It's used by Unipol. It's used in forensic labs 335 00:15:12,539 --> 00:15:16,799 across 35 different countries. Exactly. And Agnesio, 336 00:15:16,919 --> 00:15:19,639 the company that created Batvox, has this tiered 337 00:15:19,639 --> 00:15:22,899 certification program for its users, basic, advanced, 338 00:15:23,179 --> 00:15:26,159 and expert levels. To become an expert, it requires 339 00:15:26,159 --> 00:15:28,840 three years of intensive contact with the software. 340 00:15:29,220 --> 00:15:32,240 Wait, I have to push back, because if Batbox 341 00:15:32,240 --> 00:15:34,720 requires three years of intensive training, doesn't 342 00:15:34,720 --> 00:15:37,000 that just mean it's a highly sophisticated, powerful 343 00:15:37,000 --> 00:15:40,279 tool that just requires a deeply skilled operator? 344 00:15:40,460 --> 00:15:43,659 Like a pilot flying a 747. Yeah, exactly. Why 345 00:15:43,659 --> 00:15:46,379 is Kang calling this a failure of objectivity 346 00:15:46,379 --> 00:15:49,799 rather than just recognizing it as deep expertise? 347 00:15:50,039 --> 00:15:52,580 It's a very fair question, and it's exactly the 348 00:15:52,580 --> 00:15:54,899 defense these companies use. But the difference 349 00:15:54,899 --> 00:15:57,559 lies in reproducibility and the black box nature 350 00:15:57,559 --> 00:16:00,470 of the tool itself. OK, unpack that. A pilot 351 00:16:00,470 --> 00:16:03,549 understands the aerodynamics of the 747. They 352 00:16:03,549 --> 00:16:07,190 know why it flies. But Kang notes that in 2017, 353 00:16:07,529 --> 00:16:10,789 reports showed only 20 % to 25 % of Batbox users 354 00:16:10,789 --> 00:16:13,149 had actually completed the certification. Oh, 355 00:16:13,149 --> 00:16:16,009 wow. Yeah. And more importantly, the system relies 356 00:16:16,009 --> 00:16:18,730 on statistical probability models that the human 357 00:16:18,730 --> 00:16:21,309 operator cannot manually verify. It's a black 358 00:16:21,309 --> 00:16:24,629 box. Aha. I see. So the software spits out a 359 00:16:24,629 --> 00:16:27,629 likelihood ratio saying, hey, there is a 95 % 360 00:16:27,629 --> 00:16:30,370 chance these two voices match. But the human 361 00:16:30,370 --> 00:16:32,450 sitting at the desk can't look under the hood 362 00:16:32,450 --> 00:16:35,899 and trace the exact math to see why it thinks 363 00:16:35,899 --> 00:16:38,639 that. Exactly. The human operator is still making 364 00:16:38,639 --> 00:16:40,759 a subjective judgment call at the end of the 365 00:16:40,759 --> 00:16:43,179 day. But now they are doing it based on the opaque 366 00:16:43,179 --> 00:16:45,559 output of a statistical software program they 367 00:16:45,559 --> 00:16:48,429 likely don't fully comprehend. So we just traded 368 00:16:48,429 --> 00:16:51,110 one flawed human expert in the 1960s reading 369 00:16:51,110 --> 00:16:54,389 a squiggly line on paper for another human in 370 00:16:54,389 --> 00:16:57,409 a forensic lab today clicking buttons on a screen. 371 00:16:58,090 --> 00:17:00,970 Precisely. The empirical art remains. It's just 372 00:17:00,970 --> 00:17:03,610 wearing a lab coat made of algorithms now. That 373 00:17:03,610 --> 00:17:07,009 is deeply unsettling. Because this historical 374 00:17:07,009 --> 00:17:09,329 shift, the moment the industry realized they 375 00:17:09,329 --> 00:17:10,990 didn't need to understand the science of the 376 00:17:10,990 --> 00:17:13,769 voice, but could just let computers find statistical 377 00:17:13,769 --> 00:17:17,000 patterns and massive data sets, That is the exact 378 00:17:17,000 --> 00:17:19,420 foundation that allows tech startups today to 379 00:17:19,420 --> 00:17:22,019 believe they can use your voice to predict practically 380 00:17:22,019 --> 00:17:25,660 anything. Yes. If the FBI can use math to guess 381 00:17:25,660 --> 00:17:29,299 identity, Silicon Valley wants to use math to 382 00:17:29,299 --> 00:17:31,720 guess your soul. Which brings us perfectly into 383 00:17:31,720 --> 00:17:33,740 the mechanics of how they actually try to pull 384 00:17:33,740 --> 00:17:36,339 that off because we need to talk about a concept 385 00:17:36,339 --> 00:17:40,359 Kang calls ground truth tracings or GTT. Okay. 386 00:17:40,630 --> 00:17:43,910 This is arguably the most vital methodological 387 00:17:43,910 --> 00:17:46,789 tool Kang introduces in the entire book. Let's 388 00:17:46,789 --> 00:17:50,130 get into it. What exactly is a ground truth tracing? 389 00:17:50,950 --> 00:17:53,470 So, GTT is essentially a framework for tracking 390 00:17:53,470 --> 00:17:57,289 how human engineers take incredibly messy, ambiguous 391 00:17:57,289 --> 00:18:00,049 real -world problems and literally force them 392 00:18:00,049 --> 00:18:03,130 into neat machine -learnable mathematical formats. 393 00:18:03,609 --> 00:18:06,029 Because an AI doesn't just learn abstract concepts 394 00:18:06,029 --> 00:18:08,250 on its own. Right. You can't just tell an AI, 395 00:18:08,569 --> 00:18:10,390 find a good employee. It doesn't know what good 396 00:18:10,390 --> 00:18:12,170 means. It doesn't even know what an employee 397 00:18:12,170 --> 00:18:14,349 is. It only knows numbers. Right. It's just a 398 00:18:14,349 --> 00:18:17,970 calculator on steroids. Exactly. So it has to 399 00:18:17,970 --> 00:18:20,109 be told exactly what it is looking for. It needs 400 00:18:20,109 --> 00:18:23,730 a ground truth. A ground truth. Yes. A reference 401 00:18:23,730 --> 00:18:26,210 point. A specific set of data that the human 402 00:18:26,210 --> 00:18:29,289 engineers have defined as 100 % factual and correct. 403 00:18:30,009 --> 00:18:32,450 The AI then uses that ground truth as the North 404 00:18:32,450 --> 00:18:35,099 Star to evaluate all new data coming in. And 405 00:18:35,099 --> 00:18:37,839 defining that ground truth requires so many massive 406 00:18:37,839 --> 00:18:40,259 human assumptions, compromises, and frankly, 407 00:18:40,420 --> 00:18:43,319 biases. Oh, incredible amounts of bias. Kang 408 00:18:43,319 --> 00:18:45,619 illustrates this with a chilling case study that 409 00:18:45,619 --> 00:18:48,440 I think everyone listening will find extremely 410 00:18:48,440 --> 00:18:51,819 relevant. It's about this voice AI startup that 411 00:18:51,819 --> 00:18:55,079 offers what is essentially a vocal resume. It 412 00:18:55,079 --> 00:18:58,539 is a prime example of GTT in action. So this 413 00:18:58,539 --> 00:19:01,220 startup claims its AI can analyze a job candidate's 414 00:19:01,220 --> 00:19:04,000 voice and To be clear, we are talking just the 415 00:19:04,000 --> 00:19:06,220 acoustic sound of it, not the actual words being 416 00:19:06,220 --> 00:19:09,019 spoken. And predict how well that candidate will 417 00:19:09,019 --> 00:19:11,619 fit into a corporate team. Right. It predicts 418 00:19:11,619 --> 00:19:14,380 their personality traits, their emotional stability, 419 00:19:14,380 --> 00:19:17,440 and how they will perform on the job. And the 420 00:19:17,440 --> 00:19:19,259 founder of this startup claims that technology 421 00:19:19,259 --> 00:19:21,920 is entirely independent of language or culture. 422 00:19:22,279 --> 00:19:25,720 Which sounds like literal magic. Or just pure 423 00:19:25,720 --> 00:19:28,420 science fiction. Because if you were just listening 424 00:19:28,420 --> 00:19:31,220 to the pitch and the cadence, How on earth do 425 00:19:31,220 --> 00:19:33,619 you train a machine to hear a concept as abstract 426 00:19:33,619 --> 00:19:36,859 as team fit? You do it through what is known 427 00:19:36,859 --> 00:19:39,960 as the example -based paradigm. And when Kang 428 00:19:39,960 --> 00:19:42,460 breaks down how they actually do it, it exposes 429 00:19:42,460 --> 00:19:47,000 a massive fundamental logical flaw. How so? Well, 430 00:19:47,519 --> 00:19:50,599 to train this AI, the startup doesn't rely on 431 00:19:50,599 --> 00:19:53,700 centuries of sociological, psychological, or 432 00:19:53,700 --> 00:19:55,599 organizational research about what makes a good 433 00:19:55,599 --> 00:19:58,099 team dynamic. They don't read the science, just 434 00:19:58,099 --> 00:20:00,710 like the FBI abandoned the biology. Exactly the 435 00:20:00,710 --> 00:20:02,849 same thing. Instead, they just go to the client 436 00:20:02,849 --> 00:20:04,890 company, let's say a big accounting firm, and 437 00:20:04,890 --> 00:20:07,569 they say, hey, give us voice recordings of your 438 00:20:07,569 --> 00:20:10,329 current good employees. The people you've already 439 00:20:10,329 --> 00:20:14,109 decided are top performers. Yes. OK, I want to 440 00:20:14,109 --> 00:20:16,089 slow down here because this is where the tech 441 00:20:16,089 --> 00:20:19,789 goes from sounding like magic to sounding incredibly 442 00:20:19,789 --> 00:20:22,569 mechanical. We really need to explain how a computer 443 00:20:22,569 --> 00:20:25,410 actually hears these good employees. Walk me 444 00:20:25,410 --> 00:20:27,740 through the mechanism. How do we get from a human 445 00:20:27,740 --> 00:20:30,319 speaking into a microphone to a machine deciding 446 00:20:30,319 --> 00:20:33,160 their personality? Okay, so it's all about extracting 447 00:20:33,160 --> 00:20:35,799 features and mapping them into a vector space. 448 00:20:36,160 --> 00:20:38,819 A vector space, okay. When you speak into a microphone, 449 00:20:39,019 --> 00:20:41,200 the sound wave is converted into digital data, 450 00:20:41,380 --> 00:20:44,259 zeros and ones. The AI software then combs through 451 00:20:44,259 --> 00:20:47,339 that digital audio and extracts acoustic features. 452 00:20:47,960 --> 00:20:50,660 What kind of features? Things like pitch, the 453 00:20:50,660 --> 00:20:53,440 variation in pitch, which they call jitter. The 454 00:20:53,440 --> 00:20:55,420 variation in loudness, which is called shimmer. 455 00:20:55,769 --> 00:20:58,250 the speed of speech, the length of the pauses 456 00:20:58,250 --> 00:21:00,910 between your words. There can be hundreds of 457 00:21:00,910 --> 00:21:03,609 these tiny microscopic acoustic measurements. 458 00:21:04,390 --> 00:21:06,829 So the AI completely strips away the words, strips 459 00:21:06,829 --> 00:21:09,230 away the meaning, and just creates a massive 460 00:21:09,230 --> 00:21:11,670 spreadsheet of these acoustic measurements for 461 00:21:11,670 --> 00:21:14,730 every single voice. Yes. And then it plots those 462 00:21:14,730 --> 00:21:17,450 measurements on a graph. OK. I'm with you. Now, 463 00:21:17,549 --> 00:21:19,609 if we were just measuring Two things, say, pitch 464 00:21:19,609 --> 00:21:22,630 and speed. We could plot it on a normal 2D piece 465 00:21:22,630 --> 00:21:24,990 of graph paper. Pitch is the y -axis. Speed is 466 00:21:24,990 --> 00:21:27,910 the x -axis. Your voice is a single dot on that 467 00:21:27,910 --> 00:21:30,990 paper. Simple enough. But the AI is measuring 468 00:21:30,990 --> 00:21:33,170 hundreds of features, right? So it doesn't plot 469 00:21:33,170 --> 00:21:36,410 them on a 2D graph. It plots them in a high -dimensional 470 00:21:36,410 --> 00:21:38,950 vector space. OK, wait. Let me slow you down 471 00:21:38,950 --> 00:21:41,430 there. What exactly does a high -dimensional 472 00:21:41,430 --> 00:21:44,150 vector space look like? Well, imagine a graph 473 00:21:44,150 --> 00:21:48,029 with 300 different axes all intersecting at once. 474 00:21:48,759 --> 00:21:52,369 I can't even picture that. A human brain literally 475 00:21:52,369 --> 00:21:54,730 cannot visualize it. It's impossible. But the 476 00:21:54,730 --> 00:21:57,250 computer can calculate it perfectly. It takes 477 00:21:57,250 --> 00:22:00,130 a complex, localized reality, a human voice with 478 00:22:00,130 --> 00:22:02,190 all its history, culture, and nuance, and it 479 00:22:02,190 --> 00:22:05,329 flattens it into a single mathematical coordinate 480 00:22:05,329 --> 00:22:08,549 in this massive, invisible, multi -dimensional 481 00:22:08,549 --> 00:22:12,589 space. Okay, I'm tracking with you now. So the 482 00:22:12,589 --> 00:22:15,490 AI takes all the good employees at this accounting 483 00:22:15,490 --> 00:22:18,650 firm, measure their voices, and plots them all 484 00:22:18,650 --> 00:22:22,599 in this 300 -dimensional space. Yes. And presumably 485 00:22:22,599 --> 00:22:24,700 because they all have similar communication styles 486 00:22:24,700 --> 00:22:28,019 that the managers obviously like, their dots 487 00:22:28,019 --> 00:22:30,660 cluster together in one specific area of the 488 00:22:30,660 --> 00:22:33,859 graph. Precisely. And that cluster becomes the 489 00:22:33,859 --> 00:22:36,700 ground truth. The AI draws a mathematical circle 490 00:22:36,700 --> 00:22:39,680 around that cluster and says, this specific area 491 00:22:39,680 --> 00:22:42,400 of acoustic coordinates equals a good employee. 492 00:22:42,589 --> 00:22:44,769 Here is where I have a massive problem with this. 493 00:22:45,309 --> 00:22:48,589 If this AI is just plotting points, and the ground 494 00:22:48,589 --> 00:22:51,390 truth is purely based on comparing my voice to 495 00:22:51,390 --> 00:22:52,769 the voices of the guys who already work at the 496 00:22:52,769 --> 00:22:55,190 firm, isn't this just a high -tech machine for 497 00:22:55,190 --> 00:22:57,690 enforcing corporate conformity? You've hit the 498 00:22:57,690 --> 00:22:59,609 exact critique, Kang, levels at this system. 499 00:23:00,150 --> 00:23:03,269 The AI isn't finding universal objective truths 500 00:23:03,269 --> 00:23:06,289 about human personality or competency. It is 501 00:23:06,289 --> 00:23:09,089 strictly mathematically measuring statistical 502 00:23:09,089 --> 00:23:11,829 proximity to the people who were already hired 503 00:23:11,829 --> 00:23:14,329 by the human managers of that specific company. 504 00:23:14,529 --> 00:23:16,529 It's just laundering human bias with the authority 505 00:23:16,529 --> 00:23:19,470 of machine learning. Exactly. I mean, let's say 506 00:23:19,470 --> 00:23:21,809 the current team at this firm is highly homogenous. 507 00:23:22,109 --> 00:23:25,809 Say they are predominantly white. male, neurotypical 508 00:23:25,809 --> 00:23:28,190 individuals from a similar socioeconomic class, 509 00:23:28,250 --> 00:23:30,609 and they all speak with a similar cadence and 510 00:23:30,609 --> 00:23:33,809 confidence level. Their specific vocal coordinates 511 00:23:33,809 --> 00:23:36,769 literally become the objective mathematical standard 512 00:23:36,769 --> 00:23:40,170 for a good employee. Yes. And the example -based 513 00:23:40,170 --> 00:23:42,849 paradigm assumes that because they have a large 514 00:23:42,849 --> 00:23:45,990 data set of employee voices, the underlying rules 515 00:23:45,990 --> 00:23:48,970 of good performance must be hidden in there somewhere. 516 00:23:48,970 --> 00:23:51,930 Right. They believe that data scale replaces 517 00:23:51,930 --> 00:23:54,980 the need for theory. But as Kang points out, 518 00:23:55,319 --> 00:23:58,299 vectorizing data inherently strips away the genesis 519 00:23:58,299 --> 00:24:00,900 and context of the voice. Right, because the 520 00:24:00,900 --> 00:24:03,619 AI doesn't know why you paused before you speak. 521 00:24:04,160 --> 00:24:07,299 No. It just knows that you paused. Like, you 522 00:24:07,299 --> 00:24:09,039 might be carefully translating a thought for 523 00:24:09,039 --> 00:24:11,559 your native language into English, which shows 524 00:24:11,559 --> 00:24:14,660 high cognitive ability and care. But the AI just 525 00:24:14,660 --> 00:24:17,430 measures quote unquote, long pause, compares 526 00:24:17,430 --> 00:24:19,410 it to the fast talking white guys in the cluster, 527 00:24:19,890 --> 00:24:22,549 and plots your dot far away from the good employee 528 00:24:22,549 --> 00:24:25,269 circle. Exactly. You're a judge not on who you 529 00:24:25,269 --> 00:24:27,890 are or your actual skills, but purely on your 530 00:24:27,890 --> 00:24:30,390 acoustic mathematical distance from the status 531 00:24:30,390 --> 00:24:33,650 quo. That's awful. If you have a African -American 532 00:24:33,650 --> 00:24:36,390 vernacular English cadence or a regional accent 533 00:24:36,390 --> 00:24:39,029 or a slight vocal tick, you are mathematically 534 00:24:39,029 --> 00:24:42,150 plotted further away. The AI automatically flags 535 00:24:42,150 --> 00:24:44,789 you as a bad fit. And because it's a machine 536 00:24:44,789 --> 00:24:47,529 outputting a number, the HR department assumes 537 00:24:47,529 --> 00:24:50,289 it's an objective, unbiased evaluation. Yes. 538 00:24:50,789 --> 00:24:54,170 They trust the math. This is deeply dystopian. 539 00:24:54,589 --> 00:24:57,049 We are buying software thinking it's an objective 540 00:24:57,049 --> 00:24:59,950 tool when it's actually just a digital mirror 541 00:24:59,950 --> 00:25:02,809 reflecting our existing biases back at us, but 542 00:25:02,809 --> 00:25:04,930 giving them this false weight of mathematical 543 00:25:04,930 --> 00:25:08,410 certainty. It's a huge problem. And this gets 544 00:25:08,410 --> 00:25:10,509 even more concerning when we move beyond predicting 545 00:25:10,509 --> 00:25:13,720 team fit, which is vague enough. to predicting 546 00:25:13,720 --> 00:25:16,279 something intensely subjective and fleeting. 547 00:25:16,759 --> 00:25:18,880 You're talking about human emotion. Exactly. 548 00:25:19,759 --> 00:25:21,960 If an AI can flatten personality into a math 549 00:25:21,960 --> 00:25:24,460 equation based purely on a cluster of existing 550 00:25:24,460 --> 00:25:27,519 employees, how does it handle emotion? Because 551 00:25:27,519 --> 00:25:30,440 emotion isn't static. It changes second by second. 552 00:25:30,799 --> 00:25:33,640 It's true. This is a massive subfield, and Kang 553 00:25:33,640 --> 00:25:36,039 dedicates a significant portion of his analysis 554 00:25:36,039 --> 00:25:38,579 to it. It's called speech emotion recognition, 555 00:25:38,900 --> 00:25:42,390 or SER. SER, right. It is an entire ecosystem 556 00:25:42,390 --> 00:25:45,410 of researchers and startups dedicated to teaching 557 00:25:45,410 --> 00:25:49,150 machines how to hear how we feel. And just like 558 00:25:49,150 --> 00:25:52,250 the vocal resume AI needed a ground truth, the 559 00:25:52,250 --> 00:25:55,619 SER field needs a ground truth for emotion. But 560 00:25:55,619 --> 00:25:58,119 before you can teach an AI to recognize an emotion, 561 00:25:58,279 --> 00:26:00,940 you run into a massive scientific roadblock. 562 00:26:01,619 --> 00:26:04,200 You have to actually define what an emotion is. 563 00:26:04,420 --> 00:26:06,819 And from what I understand, scientists don't 564 00:26:06,819 --> 00:26:09,930 even agree on that. It is one of the most fiercely 565 00:26:09,930 --> 00:26:12,230 debated topics in psychology and neuroscience 566 00:26:12,230 --> 00:26:15,009 today. There is no single agreed upon definition. 567 00:26:15,710 --> 00:26:18,109 Modern science, like the work of Lisa Feldman 568 00:26:18,109 --> 00:26:21,089 Barrett, increasingly views emotion as highly 569 00:26:21,089 --> 00:26:24,690 complex, highly contextual, and actually constructed 570 00:26:24,690 --> 00:26:28,210 in the moment by your brain based on past experience 571 00:26:28,210 --> 00:26:31,130 and current environment. Okay, so it isn't just 572 00:26:31,130 --> 00:26:34,079 a hardwired circuit. Right. So there isn't just 573 00:26:34,079 --> 00:26:36,819 one universal sadness circuit in the brain that 574 00:26:36,819 --> 00:26:38,940 lights up exactly the same way for every human 575 00:26:38,940 --> 00:26:41,779 on Earth. But that kind of messy, constructed, 576 00:26:42,140 --> 00:26:44,240 contextual reality is completely useless for 577 00:26:44,240 --> 00:26:46,700 machine learning. Completely useless. Machine 578 00:26:46,700 --> 00:26:49,500 learning needs neat. discrete labels. It needs 579 00:26:49,500 --> 00:26:52,960 buckets to put the data into. So the SER field 580 00:26:52,960 --> 00:26:55,960 largely ignores the modern contextual science 581 00:26:55,960 --> 00:26:58,339 of emotion and overwhelmingly relies on a much 582 00:26:58,339 --> 00:27:00,720 older, much more rigid framework called discrete 583 00:27:00,720 --> 00:27:03,039 emotion theory. This is Paul Ekman stuff, right? 584 00:27:03,839 --> 00:27:06,519 Yes. Ekman theorized that there are six basic 585 00:27:06,519 --> 00:27:09,380 biologically hardwired universal human emotions. 586 00:27:10,440 --> 00:27:14,039 Anger, disgust, fear, happiness, sadness, and 587 00:27:14,039 --> 00:27:16,559 surprise. I always think of this like the Pixar 588 00:27:16,559 --> 00:27:18,990 movie Inside Out. That's a perfect example. You 589 00:27:18,990 --> 00:27:21,289 just have these distinct little colored characters 590 00:27:21,289 --> 00:27:23,390 living in your head, pulling levers. It's a very 591 00:27:23,390 --> 00:27:25,630 clean, easy way to categorize feelings. It is. 592 00:27:25,930 --> 00:27:28,230 It's theoretically outdated, according to many 593 00:27:28,230 --> 00:27:30,609 modern psychologists, but it is mathematically 594 00:27:30,609 --> 00:27:33,269 incredibly convenient for AI developers. It gives 595 00:27:33,269 --> 00:27:36,650 them six neat little buckets. Right. But Kang 596 00:27:36,650 --> 00:27:39,569 exposes a much deeper problem here. The issue 597 00:27:39,569 --> 00:27:42,349 isn't just the six buckets. The issue is how 598 00:27:42,349 --> 00:27:44,470 the AI developers actually fill those buckets 599 00:27:44,470 --> 00:27:47,549 with data. How do you get the audio recordings 600 00:27:47,549 --> 00:27:49,849 to teach the machine what these six emotions 601 00:27:49,849 --> 00:27:52,569 sound like? And to explore this, Kang zeroes 602 00:27:52,569 --> 00:27:55,589 in on a specific benchmark dataset called the 603 00:27:55,589 --> 00:27:58,849 Montreal Effective Voices Dataset or MOV. Yes. 604 00:27:59,930 --> 00:28:02,779 This blew my mind. Because if you were building 605 00:28:02,779 --> 00:28:05,259 a data set to teach a machine what real human 606 00:28:05,259 --> 00:28:07,480 emotion sounds like, you would assume they went 607 00:28:07,480 --> 00:28:09,900 out and recorded people in real life highly emotional 608 00:28:09,900 --> 00:28:11,619 situations. You would think they'd use police 609 00:28:11,619 --> 00:28:14,440 body cams or emergency room audio or even just 610 00:28:14,440 --> 00:28:17,720 people reacting to surprising news, genuine spontaneous 611 00:28:17,720 --> 00:28:20,500 emotion. But they didn't do that at all. No. 612 00:28:21,099 --> 00:28:24,440 They brought actors into a studio. But, and this 613 00:28:24,440 --> 00:28:26,539 is key, they didn't even ask the actors to produce 614 00:28:26,539 --> 00:28:29,809 genuine emotional performances. What did they 615 00:28:29,809 --> 00:28:32,819 do? Kang explains that the MOV creators deliberately 616 00:28:32,819 --> 00:28:35,700 used a methodology called communication affect 617 00:28:35,700 --> 00:28:39,980 acting, or CEA. They explicitly instructed the 618 00:28:39,980 --> 00:28:42,980 actors to make stereotypical, highly exaggerated 619 00:28:42,980 --> 00:28:46,380 vocal bursts. Just sounds, no words? No words, 620 00:28:46,539 --> 00:28:49,359 just sounds. So if they wanted the fear bucket 621 00:28:49,359 --> 00:28:51,759 filled, they didn't want the actor to draw on 622 00:28:51,759 --> 00:28:54,519 a real memory of being terrified? No. Because 623 00:28:54,519 --> 00:28:57,240 that would be felt -experienced acting, or FEA, 624 00:28:57,599 --> 00:28:59,940 where the actor internalizes the emotion and 625 00:28:59,940 --> 00:29:03,079 the resulting sound is complex and subtle. The 626 00:29:03,079 --> 00:29:05,660 MOV creators didn't want subtle. They instructed 627 00:29:05,660 --> 00:29:07,859 the actors to strip away all personal context, 628 00:29:08,140 --> 00:29:10,839 all subtlety, and just deliver the most universally 629 00:29:10,839 --> 00:29:13,759 recognizable, almost cartoonishly pantomimed 630 00:29:13,759 --> 00:29:16,500 acoustic signal possible. I want to demonstrate 631 00:29:16,500 --> 00:29:19,400 this because it highlights how absurd the methodology 632 00:29:19,400 --> 00:29:22,039 is. Please do. If I use felt -experienced acting... 633 00:29:22,109 --> 00:29:24,170 And I imagine someone breaking into my house. 634 00:29:24,890 --> 00:29:27,329 My genuine fear response might be totally silent. 635 00:29:27,390 --> 00:29:30,150 I might just freeze. Or my breath might just 636 00:29:30,150 --> 00:29:32,670 get slightly shallow and I might whisper, who's 637 00:29:32,670 --> 00:29:35,609 there? Exactly. But the AI data set doesn't want 638 00:29:35,609 --> 00:29:38,329 that. It wants communication effect acting. It 639 00:29:38,329 --> 00:29:42,029 wants me to go, huh. Yes. That exaggerated gasp 640 00:29:42,029 --> 00:29:44,809 is exactly what gets recorded, vectorized, and 641 00:29:44,809 --> 00:29:47,750 plotted as the absolute mathematical ground truth 642 00:29:47,750 --> 00:29:51,640 for fear. That's insane. It is. And Kang makes 643 00:29:51,640 --> 00:29:54,319 a brilliant observation here. The creators of 644 00:29:54,319 --> 00:29:56,759 these data sets are not merely objective collectors 645 00:29:56,759 --> 00:30:00,240 of data. They are acting as emotional designers. 646 00:30:00,900 --> 00:30:03,359 Emotional designers. Yes. They are literally 647 00:30:03,359 --> 00:30:06,119 dictating to the machine what human emotion should 648 00:30:06,119 --> 00:30:08,160 sound like based on their own highly subjective 649 00:30:08,160 --> 00:30:10,720 assumptions of what a recognizable signal is. 650 00:30:11,099 --> 00:30:12,880 It's like a movie director telling an actor to 651 00:30:12,880 --> 00:30:16,109 act happy. in the most cliche, over -the -top, 652 00:30:16,369 --> 00:30:18,710 grinning, ear -to -ear way possible. Recording 653 00:30:18,710 --> 00:30:20,529 that audio and then telling a massive neural 654 00:30:20,529 --> 00:30:23,549 network, this is the only acceptable acoustic 655 00:30:23,549 --> 00:30:26,069 signature for happiness. And the real -world 656 00:30:26,069 --> 00:30:28,470 consequences of this design choice are immediate 657 00:30:28,470 --> 00:30:31,430 and severe. How so? Kang brings it back to the 658 00:30:31,430 --> 00:30:34,190 call centers. Companies are deploying this exact 659 00:30:34,190 --> 00:30:36,970 type of emotion AI to monitor customer service 660 00:30:36,970 --> 00:30:40,069 agents in real time, right now. So the AI is 661 00:30:40,069 --> 00:30:42,400 sitting on the line. listening to the agent's 662 00:30:42,400 --> 00:30:45,839 voice all day long, and scoring them on how happy 663 00:30:45,839 --> 00:30:49,259 or empathetic they sound, based entirely on its 664 00:30:49,259 --> 00:30:52,339 training from these exaggerated data sets. Yes. 665 00:30:52,599 --> 00:30:55,220 And in many cases, the worker's actual financial 666 00:30:55,220 --> 00:30:57,279 compensation, their bonuses, and their performance 667 00:30:57,279 --> 00:30:59,720 reviews are directly tied to these AI scores. 668 00:31:00,259 --> 00:31:02,839 So let me get this straight. If I'm a call center 669 00:31:02,839 --> 00:31:06,220 worker, and I am naturally a calm, soft -spoken 670 00:31:06,220 --> 00:31:08,920 person, I resolve the customer's issue politely 671 00:31:08,920 --> 00:31:12,240 and efficiently. Because I don't sound like a 672 00:31:12,240 --> 00:31:14,859 cartoon character, because my natural expression 673 00:31:14,859 --> 00:31:17,759 of contentment doesn't match the exaggerated 674 00:31:17,759 --> 00:31:20,440 communication affect acting birth that the AI 675 00:31:20,440 --> 00:31:24,599 was trained on, the AI flags me as unenthusiastic 676 00:31:24,599 --> 00:31:27,980 and it actually docks my pay? Precisely. The 677 00:31:27,980 --> 00:31:30,559 system demands an acoustic performance that matches 678 00:31:30,559 --> 00:31:34,039 its highly engineered ground truth. And Kang 679 00:31:34,039 --> 00:31:37,079 draws a vital, profound link to disability studies 680 00:31:37,079 --> 00:31:40,900 here. Oh, I can see where this is going. By training 681 00:31:40,900 --> 00:31:44,539 AI on these exaggerated neurotypical vocal bursts, 682 00:31:45,079 --> 00:31:47,920 the developers are establishing a rigid technological 683 00:31:47,920 --> 00:31:51,819 definition of normal. Right. It completely pathologizes 684 00:31:51,819 --> 00:31:53,980 anyone who falls outside that narrow acoustic 685 00:31:53,980 --> 00:31:57,559 window. Exactly. If you are neurodivergent and 686 00:31:57,559 --> 00:32:00,339 perhaps speak with a flatter affect, if you have 687 00:32:00,339 --> 00:32:02,839 a speech impediment, or even if your cultural 688 00:32:02,839 --> 00:32:05,119 background just expresses emotion with a different 689 00:32:05,119 --> 00:32:08,519 cadence, volume, or rhythm, Your voice is instantly 690 00:32:08,519 --> 00:32:11,420 and mathematically categorized as aberrant. Wow. 691 00:32:11,700 --> 00:32:14,299 You are flagged as angry when you are just passionate. 692 00:32:14,720 --> 00:32:16,880 You are flagged as sad when you are just intensely 693 00:32:16,880 --> 00:32:20,519 focused. The AI is actively policing human expression, 694 00:32:20,920 --> 00:32:23,200 forcing everyone to conform to a manufactured, 695 00:32:23,700 --> 00:32:26,799 engineered standard of emotion just to be recognized 696 00:32:26,799 --> 00:32:29,779 as competent. It's incredibly dystopian. Yeah. 697 00:32:29,880 --> 00:32:32,339 We are literally altering our own bodies, changing 698 00:32:32,339 --> 00:32:35,319 the way we breathe and speak in our daily jobs 699 00:32:35,319 --> 00:32:38,019 just to appease a machine that was trained on 700 00:32:38,019 --> 00:32:41,759 bad acting. It's a bizarre inversion of reality. 701 00:32:41,940 --> 00:32:45,420 It really is. But Kang doesn't stop there. We've 702 00:32:45,420 --> 00:32:47,680 spent all this time talking about how machines 703 00:32:47,680 --> 00:32:50,240 are taught this highly artificial way of listening 704 00:32:50,240 --> 00:32:53,299 to us. But the script completely flips when these 705 00:32:53,299 --> 00:32:56,559 exact same artificial mechanics are used to make 706 00:32:56,559 --> 00:33:00,250 machines speak. That transitions us beautifully 707 00:33:00,250 --> 00:33:03,750 into interlude 2 and chapter 4 of the book, which 708 00:33:03,750 --> 00:33:07,049 moves from listening machines to AI voice engines. 709 00:33:07,609 --> 00:33:09,329 We are entering the realm of text to speech, 710 00:33:09,690 --> 00:33:12,289 synthetic voices, and deep fake voice cloning. 711 00:33:12,849 --> 00:33:15,549 To ground this section, Kang brings in a really 712 00:33:15,549 --> 00:33:18,009 fascinating concept from film theory, going back 713 00:33:18,009 --> 00:33:20,730 to Michelle Sheehan again. It's the idea of the 714 00:33:20,730 --> 00:33:24,529 acousmatic voice. Yes. The acousmatic voice refers 715 00:33:24,529 --> 00:33:26,529 to a voice that you can hear, but you cannot 716 00:33:26,529 --> 00:33:29,299 see the body that is producing it. Think of the 717 00:33:29,299 --> 00:33:31,480 classic example, the booming wizard behind the 718 00:33:31,480 --> 00:33:34,960 curtain in The Wizard of Oz, or Howl 9000 in 719 00:33:34,960 --> 00:33:38,279 2001, A Space Odyssey. When we encounter an acousmatic 720 00:33:38,279 --> 00:33:41,000 voice, our human brains can't just leave it alone. 721 00:33:41,700 --> 00:33:44,200 We don't just hear the sound. We immediately 722 00:33:44,200 --> 00:33:48,380 try to imagine the source. Yes. Our brains automatically 723 00:33:48,380 --> 00:33:51,019 try to conjure a physical body to match the voice 724 00:33:51,019 --> 00:33:53,900 we are hearing. That mentally conjured body is 725 00:33:53,900 --> 00:33:56,539 what scholar Stephen Conner calls the vocalic 726 00:33:56,539 --> 00:34:00,559 body. the vocalic body. As humans, we inherently 727 00:34:00,559 --> 00:34:02,980 link voice and body. Our entire evolutionary 728 00:34:02,980 --> 00:34:05,359 history tells us that one cannot exist without 729 00:34:05,359 --> 00:34:07,299 the other. You can't have a voice without lungs, 730 00:34:07,500 --> 00:34:11,400 a throat, a mouth. But AI voice generation completely 731 00:34:11,400 --> 00:34:14,119 severs this biological link. Kong talks about 732 00:34:14,119 --> 00:34:17,360 the recent explosion in this technology as the 733 00:34:17,360 --> 00:34:21,619 chat GPT moment for audio. It really was. We 734 00:34:21,619 --> 00:34:24,320 have companies like Eleven Labs generating incredibly 735 00:34:24,320 --> 00:34:27,139 realistic human speech from text prompts. Sounds 736 00:34:27,139 --> 00:34:30,019 perfect. It has breath noises, it has pacing, 737 00:34:30,199 --> 00:34:33,920 it has micro hesitations. But to understand what 738 00:34:33,920 --> 00:34:36,659 is profoundly missing from these synthetic voices, 739 00:34:37,340 --> 00:34:39,420 Kong actually steps away from the tech developers 740 00:34:39,420 --> 00:34:42,219 and goes to interview professional human voice 741 00:34:42,219 --> 00:34:44,380 actors. And those interviews are some of the 742 00:34:44,380 --> 00:34:46,840 most illuminating parts of the book. He talks 743 00:34:46,840 --> 00:34:49,420 to actors named Jane and Christopher, and they 744 00:34:49,420 --> 00:34:52,639 explain that the human act of voicing is deeply, 745 00:34:53,199 --> 00:34:56,360 inherently, and inescapably embodied. It is a 746 00:34:56,360 --> 00:34:59,280 physical act. Right. Christopher talks about 747 00:34:59,280 --> 00:35:02,219 how when he voices a specific cartoon character, 748 00:35:02,719 --> 00:35:05,239 he doesn't just change his throat. He changes 749 00:35:05,239 --> 00:35:08,400 the entire physical geometry of his body. Exactly. 750 00:35:08,820 --> 00:35:11,480 He might square shoulders. thrust his chest out, 751 00:35:12,019 --> 00:35:13,760 alter the shape of his mouth, change the depth 752 00:35:13,760 --> 00:35:17,380 of his breathing. The voice is a byproduct of 753 00:35:17,380 --> 00:35:20,579 a physical posture. And Jane discusses the psychological 754 00:35:20,579 --> 00:35:23,360 aspect. Producing a specific emotional voice 755 00:35:23,360 --> 00:35:26,159 requires drawing on deep personal memories, lived 756 00:35:26,159 --> 00:35:29,260 experiences, and past traumas to find the right 757 00:35:29,260 --> 00:35:31,340 resonance and emotional truth in her delivery. 758 00:35:32,079 --> 00:35:34,920 Human voicing is a highly localized physical 759 00:35:34,920 --> 00:35:37,559 and psychological event. It comes from a specific 760 00:35:37,559 --> 00:35:40,639 body, in a specific place, with a specific history. 761 00:35:41,280 --> 00:35:43,719 But the machine act of synthesizing a voice has 762 00:35:43,719 --> 00:35:47,019 absolutely none of that. None. An AI voice engine 763 00:35:47,019 --> 00:35:49,440 doesn't have lungs, it doesn't have a diaphragm, 764 00:35:49,739 --> 00:35:51,760 it doesn't have a physical geometry to alter, 765 00:35:51,840 --> 00:35:54,019 and it certainly doesn't have memories to draw 766 00:35:54,019 --> 00:35:56,840 upon. Kang points out that an AI voice is created 767 00:35:56,840 --> 00:35:59,719 by statistically averaging hundreds, sometimes 768 00:35:59,719 --> 00:36:01,880 thousands, of individual human performances. 769 00:36:02,480 --> 00:36:05,030 So the neural network takes the breath intake 770 00:36:05,030 --> 00:36:07,690 of one actor, the gravely cadence of another, 771 00:36:07,829 --> 00:36:11,230 the emotional timbre of a third, and mathematically 772 00:36:11,230 --> 00:36:13,710 mashes them together in that high dimensional 773 00:36:13,710 --> 00:36:16,929 vector space we talked about earlier. Yep. It 774 00:36:16,929 --> 00:36:18,670 interpolates between the points to create a new 775 00:36:18,670 --> 00:36:22,610 average point. Exactly. It creates a manufactured 776 00:36:22,610 --> 00:36:25,309 surface effect. It sounds natural to our ears, 777 00:36:25,309 --> 00:36:27,670 but it is completely hollow. I was going to use 778 00:36:27,670 --> 00:36:30,949 the analogy that it's essentially a digital Frankenstein's 779 00:36:30,949 --> 00:36:33,670 monster. Right. It's stitched together from stolen 780 00:36:33,670 --> 00:36:36,230 human breaths and memories, and it walks and 781 00:36:36,230 --> 00:36:38,909 talks, but there is literally nobody home. Right. 782 00:36:39,840 --> 00:36:43,059 But actually, based on what Kang is saying, Frankenstein's 783 00:36:43,059 --> 00:36:45,840 monster is too generous an analogy. The monster 784 00:36:45,840 --> 00:36:48,940 actually had a physical body. The AI voice doesn't 785 00:36:48,940 --> 00:36:52,559 even have that. It is pure disembodied math masquerading 786 00:36:52,559 --> 00:36:54,820 as a human soul. That is a much more accurate 787 00:36:54,820 --> 00:36:58,139 way to look at it. It turns what was a unique 788 00:36:58,309 --> 00:37:01,570 embodied human expression into a completely disembodied 789 00:37:01,570 --> 00:37:03,730 mass -produced commodity. And once the voice 790 00:37:03,730 --> 00:37:06,210 is severed from the body and turned into a commodity, 791 00:37:06,670 --> 00:37:09,429 King argues, exploitation is the inevitable next 792 00:37:09,429 --> 00:37:12,230 step. And he backs that up with real -world examples. 793 00:37:12,949 --> 00:37:15,269 He highlights the Skyrim modding controversy. 794 00:37:15,869 --> 00:37:18,170 For anyone not familiar, Skyrim is a massively 795 00:37:18,170 --> 00:37:21,860 popular video game. Modders, fans who alter the 796 00:37:21,860 --> 00:37:24,940 game, started using AI tools to clone the voices 797 00:37:24,940 --> 00:37:27,579 of the professional human voice actors who originally 798 00:37:27,579 --> 00:37:30,000 worked on the game. And they did this without 799 00:37:30,000 --> 00:37:32,460 the actors' consent, and obviously without paying 800 00:37:32,460 --> 00:37:36,219 them. They took the actors' vocalic bodies, fed 801 00:37:36,219 --> 00:37:39,260 them into an AI engine, and forced these digital 802 00:37:39,260 --> 00:37:41,599 clones to say things the actors never agreed 803 00:37:41,599 --> 00:37:44,079 to say. Some of it was highly inappropriate or 804 00:37:44,079 --> 00:37:47,239 offensive material too. Yes. It's a profound 805 00:37:47,239 --> 00:37:49,860 violation of identity and a literal theft of 806 00:37:49,860 --> 00:37:52,500 labor. But the exploitation goes even deeper 807 00:37:52,500 --> 00:37:54,579 than just stealing an actor's performance for 808 00:37:54,579 --> 00:37:57,480 a video game. It extends into completely rewriting 809 00:37:57,480 --> 00:38:01,679 a person's cultural identity in real time. Kang 810 00:38:01,679 --> 00:38:04,699 brings up this terrifying phenomenon of AI passing. 811 00:38:05,260 --> 00:38:07,099 Remember the hook we started the show with, the 812 00:38:07,099 --> 00:38:09,239 call center in the Philippines? Yes, exactly. 813 00:38:09,780 --> 00:38:12,260 There are startups right now that are offering 814 00:38:12,260 --> 00:38:14,699 AI software to global call centers in places 815 00:38:14,699 --> 00:38:17,800 like the Philippines or India. The software acts 816 00:38:17,800 --> 00:38:21,659 as a real -time algorithmic filter. So how does 817 00:38:21,659 --> 00:38:24,400 it work in practice? The worker speaks in their 818 00:38:24,400 --> 00:38:27,019 natural voice with their natural accent and the 819 00:38:27,019 --> 00:38:30,159 AI intercepts the audio, strips away the worker's 820 00:38:30,159 --> 00:38:32,539 accent and replaces it on the customer's end 821 00:38:32,539 --> 00:38:35,900 with a synthesized white sounding American accent. 822 00:38:36,260 --> 00:38:38,909 And the company selling this software claim They 823 00:38:38,909 --> 00:38:41,510 are doing it for a noble reason, right? They 824 00:38:41,510 --> 00:38:44,250 say it reduces the racist abuse that offshore 825 00:38:44,250 --> 00:38:47,090 workers often face from angry American customers, 826 00:38:47,150 --> 00:38:50,030 which is a very real, horrific problem. It is 827 00:38:50,030 --> 00:38:52,309 a real problem, but the technological solution 828 00:38:52,309 --> 00:38:54,969 they are offering is profoundly disturbing. They 829 00:38:54,969 --> 00:38:58,170 are selling a digital, vocalic body. They are 830 00:38:58,170 --> 00:39:00,349 saying, your physical reality, your actual voice 831 00:39:00,349 --> 00:39:03,710 is the problem. It is unacceptable. The solution 832 00:39:03,710 --> 00:39:05,889 is to completely erase the worker's identity. 833 00:39:06,139 --> 00:39:08,719 substituting it with a mathematically generated 834 00:39:08,719 --> 00:39:11,940 shield of whiteness. It reinforces the exact 835 00:39:11,940 --> 00:39:14,820 racism it claims to be circumventing. It tells 836 00:39:14,820 --> 00:39:17,500 the customer, you're right. You only deserve 837 00:39:17,500 --> 00:39:20,559 to speak to someone who sounds like a white midwesterner. 838 00:39:20,900 --> 00:39:23,039 It treats the human voice like a cheap coat of 839 00:39:23,039 --> 00:39:25,599 paint that you can just digitally swap out to 840 00:39:25,599 --> 00:39:27,960 appease a biased algorithm or a biased customer. 841 00:39:28,699 --> 00:39:31,199 It is the ultimate flattening of the human experience. 842 00:39:31,699 --> 00:39:35,579 The unique localized voice is erased. And a disembodied 843 00:39:35,579 --> 00:39:38,039 statistical average of a standard accent is put 844 00:39:38,039 --> 00:39:41,360 in its place. OK, this brings up a massive logistical 845 00:39:41,360 --> 00:39:44,159 question for me. If these AI voices, whether 846 00:39:44,159 --> 00:39:47,159 it's the fake call center worker or the text 847 00:39:47,159 --> 00:39:50,019 to speech engine reading an audiobook, are just 848 00:39:50,019 --> 00:39:52,579 mechanical averages of stolen human performances, 849 00:39:53,199 --> 00:39:55,760 how does the tech industry actually evaluate 850 00:39:55,760 --> 00:39:58,599 them? What do you mean? Like, how do they prove 851 00:39:58,599 --> 00:40:01,400 to investors that their digital Frankenstein 852 00:40:01,400 --> 00:40:04,880 sounds good or natural? How do you measure the 853 00:40:04,880 --> 00:40:07,619 quality of a voice that doesn't actually exist? 854 00:40:07,900 --> 00:40:10,579 That is the perfect transition because it leads 855 00:40:10,579 --> 00:40:12,860 us into the final section of the book, Chapter 856 00:40:12,860 --> 00:40:15,579 Five. And this section reveals what might be 857 00:40:15,579 --> 00:40:18,760 the most bizarre, circular and revealing logic 858 00:40:18,760 --> 00:40:21,619 in the entire AI ecosystem. Oh, boy. It's all 859 00:40:21,619 --> 00:40:24,079 about how the industry measures progress. In 860 00:40:24,079 --> 00:40:26,639 machine learning, you absolutely need benchmark 861 00:40:26,639 --> 00:40:29,280 data sets. You need a standardized test to prove 862 00:40:29,280 --> 00:40:32,119 to the world that your new AI model is better 863 00:40:32,119 --> 00:40:34,559 than last year's model. Right. And for a long 864 00:40:34,559 --> 00:40:37,159 time, the benchmark for synthetic voices was 865 00:40:37,159 --> 00:40:40,639 pretty straightforward, right? It was human evaluation. 866 00:40:41,400 --> 00:40:44,000 They used a metric called the Mean Opinion Score, 867 00:40:44,260 --> 00:40:46,860 or MOS. Yes. They would generate a synthetic 868 00:40:46,860 --> 00:40:49,800 voice, play the audio clip for a room full of 869 00:40:49,800 --> 00:40:52,199 human listeners, and those humans would rate 870 00:40:52,199 --> 00:40:54,639 it on a scale of one to five for naturalness. 871 00:40:55,219 --> 00:40:58,380 One being terrible and robotic, five being completely 872 00:40:58,380 --> 00:41:00,869 indistinguishable from a real person. Exactly. 873 00:41:01,230 --> 00:41:03,309 The human ear was the ultimate arbiter of human 874 00:41:03,309 --> 00:41:06,690 speech. But there is a huge problem with the 875 00:41:06,690 --> 00:41:08,690 mean opinion score for the modern tech industry. 876 00:41:09,289 --> 00:41:11,269 Paying thousands of humans to sit in a room and 877 00:41:11,269 --> 00:41:13,969 listen to endless audio clips is incredibly slow. 878 00:41:14,150 --> 00:41:16,929 It's tedious. And most importantly, it is expensive. 879 00:41:17,389 --> 00:41:19,510 It creates a bottleneck in the development cycle. 880 00:41:19,789 --> 00:41:21,630 And Silicon Valley hates bottlenecks more than 881 00:41:21,630 --> 00:41:24,690 anything. So what do they do? In the name of 882 00:41:24,690 --> 00:41:26,969 speed and efficiency, the industry decided they 883 00:41:26,969 --> 00:41:29,610 needed to automate the evaluation process itself. 884 00:41:29,949 --> 00:41:32,610 Kang focuses on a specific dataset called the 885 00:41:32,610 --> 00:41:35,510 VoiceMOS benchmark. Researchers decided to take 886 00:41:35,510 --> 00:41:38,250 all the past human ratings, thousands of instances 887 00:41:38,250 --> 00:41:41,289 where humans scored an AI voice a 3 or a 4 or 888 00:41:41,289 --> 00:41:44,550 a 5, and they used that data to train an entirely 889 00:41:44,550 --> 00:41:47,630 new AI model. Okay, wait. Let me make sure I'm 890 00:41:47,630 --> 00:41:49,650 following the math here. The goal of this new 891 00:41:49,650 --> 00:41:52,309 AI model wasn't to generate speech. The goal 892 00:41:52,309 --> 00:41:55,130 of this new AI was to listen to a synthetic voice 893 00:41:55,130 --> 00:41:58,070 and, based on its training data, predict what 894 00:41:58,070 --> 00:42:00,519 rating a human would give it. if a human were 895 00:42:00,519 --> 00:42:02,420 actually listening. Wait, wait, wait. Hold on. 896 00:42:02,420 --> 00:42:04,619 This is incredible. Let me map out the full life 897 00:42:04,619 --> 00:42:08,329 cycle of this audio. Go for it. Step one, human 898 00:42:08,329 --> 00:42:10,409 actors perform to create the initial training 899 00:42:10,409 --> 00:42:15,409 data. Step two, AI model A statistically averages 900 00:42:15,409 --> 00:42:19,030 that data to synthesize a fake voice. Step three, 901 00:42:19,650 --> 00:42:21,690 instead of playing that fake voice for a human, 902 00:42:22,349 --> 00:42:25,610 AI model B is brought in to listen to AI model 903 00:42:25,610 --> 00:42:28,829 A until the engineers of model A sounds like 904 00:42:28,829 --> 00:42:31,349 a real human. That is exactly the architecture 905 00:42:31,349 --> 00:42:33,929 of the voice MOS system. That is like a student 906 00:42:33,929 --> 00:42:36,429 writing a test, grading their own test, and using 907 00:42:36,429 --> 00:42:38,489 an answer key that they hallucinated themselves. 908 00:42:39,030 --> 00:42:42,309 Pretty much. The human being, the only entity 909 00:42:42,309 --> 00:42:44,769 that actually possesses a voice and knows what 910 00:42:44,769 --> 00:42:47,789 one sounds like, has been entirely removed from 911 00:42:47,789 --> 00:42:51,789 the loop of evaluating what sounds human. It 912 00:42:51,789 --> 00:42:55,530 is a closed mechanical echo chamber. The AI ear 913 00:42:55,530 --> 00:42:59,269 is validating the AI voice. King uses this to 914 00:42:59,269 --> 00:43:02,710 expose the absolute absurdity of techno -utopianism. 915 00:43:03,230 --> 00:43:04,929 The machines are just talking to each other, 916 00:43:05,110 --> 00:43:07,769 optimizing for mathematical proximity to an old 917 00:43:07,769 --> 00:43:10,949 data set while completely detached from biological 918 00:43:10,949 --> 00:43:14,150 reality. It's a snake eating its own tail. Why 919 00:43:14,150 --> 00:43:16,510 would any rational engineer do this? It makes 920 00:43:16,510 --> 00:43:20,690 absolutely no logical scientific sense if your 921 00:43:20,690 --> 00:43:22,949 end goal is to create authentic human sounding 922 00:43:22,949 --> 00:43:25,690 speech that resonates with actual people. You're 923 00:43:25,690 --> 00:43:28,269 right. It makes no scientific sense at all, but 924 00:43:28,269 --> 00:43:30,909 it makes perfect unassailable economic sense. 925 00:43:31,210 --> 00:43:33,750 And this is where Kang ties the entire book together. 926 00:43:34,110 --> 00:43:36,269 He brings all of this back to the economics of 927 00:43:36,269 --> 00:43:39,170 the tech industry and specifically the mechanics 928 00:43:39,170 --> 00:43:42,889 of venture capital funding. Okay. In the absence 929 00:43:42,889 --> 00:43:46,320 of real grounded scientific benchmarks. Economic 930 00:43:46,320 --> 00:43:49,360 viability becomes the benchmark. Now the puzzle 931 00:43:49,360 --> 00:43:52,159 pieces are fitting together. Kang outlines what 932 00:43:52,159 --> 00:43:54,940 he calls the three P's that drive this entire 933 00:43:54,940 --> 00:43:58,599 ecosystem, progress, profit, and promise. The 934 00:43:58,599 --> 00:44:01,420 VC hype machine. Exactly. Think about companies 935 00:44:01,420 --> 00:44:04,679 like 11 Labs. Investors are pouring hundreds 936 00:44:04,679 --> 00:44:07,019 of millions, even billions of dollars into these 937 00:44:07,019 --> 00:44:10,309 voice AI startups. These massive valuations are 938 00:44:10,309 --> 00:44:12,610 not based on the scientific truth of the product. 939 00:44:12,869 --> 00:44:15,789 They aren't based on a deep fundamental understanding 940 00:44:15,789 --> 00:44:18,349 of human acoustics or biology. What are they 941 00:44:18,349 --> 00:44:21,309 based on? They are driven entirely by the promise 942 00:44:21,309 --> 00:44:24,210 of scale. The promise that you can mass produce 943 00:44:24,210 --> 00:44:27,469 the human voice as a cheap, infinitely reproducible 944 00:44:27,469 --> 00:44:30,110 commodity. And to keep that VC money flowing, 945 00:44:30,329 --> 00:44:32,170 you have to constantly show charts going up and 946 00:44:32,170 --> 00:44:34,710 to the right. You have to show progress. Yes. 947 00:44:34,940 --> 00:44:37,619 And when an AI can automatically evaluate another 948 00:44:37,619 --> 00:44:39,820 AI, you can run millions of tests in a single 949 00:44:39,820 --> 00:44:43,139 day. You can iterate and scale infinitely faster 950 00:44:43,139 --> 00:44:45,500 than if you had to wait for pesky slow human 951 00:44:45,500 --> 00:44:48,579 listeners to give you a mean opinion score. Wow. 952 00:44:48,920 --> 00:44:51,639 In the tech world, algorithmic speed and scale 953 00:44:51,639 --> 00:44:54,619 equal perceived progress. Perceived progress 954 00:44:54,619 --> 00:44:57,420 generates hype, hype generates VC funding, which 955 00:44:57,420 --> 00:45:00,619 equals profit. The financial imperative to scale 956 00:45:00,619 --> 00:45:03,320 quickly completely overrides the scientific reality 957 00:45:03,320 --> 00:45:06,099 of the technology. The machine evaluating the 958 00:45:06,099 --> 00:45:08,059 machine is just a mechanism to keep the money 959 00:45:08,059 --> 00:45:12,400 moving. So, after unpacking all of this, what 960 00:45:12,400 --> 00:45:15,659 does it all actually mean for us? We've traced 961 00:45:15,659 --> 00:45:18,340 this incredible, somewhat terrifying arc through 962 00:45:18,340 --> 00:45:22,250 Kang's book. We started in the 18th century with 963 00:45:22,250 --> 00:45:25,090 Jacques de Volcansant's mechanical duck, creating 964 00:45:25,090 --> 00:45:27,550 his surface -level illusion of biology to fool 965 00:45:27,550 --> 00:45:31,099 an audience. Right. Then we moved to the 1960s 966 00:45:31,099 --> 00:45:34,019 with the FBI and Lawrence Kirsta trying to turn 967 00:45:34,019 --> 00:45:37,480 messy voices into neat visual fingerprints and 968 00:45:37,480 --> 00:45:39,380 failing miserably because they ignored the environment 969 00:45:39,380 --> 00:45:42,179 and the equipment. And from that failure, we 970 00:45:42,179 --> 00:45:45,119 saw the pivot to deep learning, the total abandonment 971 00:45:45,119 --> 00:45:47,659 of causal science for statistical correlation, 972 00:45:48,420 --> 00:45:50,960 leading to systems like Batvox, where the human 973 00:45:50,960 --> 00:45:53,980 subjectivity is just buried under complex math. 974 00:45:54,139 --> 00:45:56,880 Right. And then we saw how that mathematical 975 00:45:56,880 --> 00:45:59,980 flattening is applied to everyday life. We have 976 00:45:59,980 --> 00:46:02,579 AI systems that are actively judging our personalities 977 00:46:02,579 --> 00:46:05,800 in our team fit and job interviews, purely based 978 00:46:05,800 --> 00:46:08,300 on our acoustic proximity to the people a company 979 00:46:08,300 --> 00:46:12,309 already hired. We have emotion AI policing our 980 00:46:12,309 --> 00:46:14,730 happiness in call centers, forcing people to 981 00:46:14,730 --> 00:46:17,329 sound like exaggerated cartoons or risk losing 982 00:46:17,329 --> 00:46:20,210 their pay. We saw the severing of the voice from 983 00:46:20,210 --> 00:46:22,949 the body entirely. cloning actors without permission 984 00:46:22,949 --> 00:46:25,809 and stripping accents in real time to create 985 00:46:25,809 --> 00:46:28,829 a mathematically generated shield of whiteness. 986 00:46:29,409 --> 00:46:31,670 And it culminates in the tech industry setting 987 00:46:31,670 --> 00:46:34,969 up systems to evaluate themselves, completely 988 00:46:34,969 --> 00:46:37,090 removing the human ear from the loop, all in 989 00:46:37,090 --> 00:46:40,489 the name of venture capital scale. Tying all 990 00:46:40,489 --> 00:46:43,230 of these disparate threads together is the overarching 991 00:46:43,230 --> 00:46:46,570 thesis of Kang's work. The book serves as a massive 992 00:46:46,570 --> 00:46:48,809 warning about the danger of using the computer 993 00:46:48,809 --> 00:46:52,030 as a metaphor for the human mind and the machine 994 00:46:52,030 --> 00:46:54,769 as a metaphor for the human body. Knowing the 995 00:46:54,769 --> 00:46:57,190 voice through artificial intelligence does not 996 00:46:57,190 --> 00:47:00,230 mean we have achieved a deeper, more profound 997 00:47:00,230 --> 00:47:02,849 understanding of humanity. Not at all. It means 998 00:47:02,849 --> 00:47:05,429 we have successfully rendered the voice mechanical. 999 00:47:06,110 --> 00:47:08,389 We have stripped away the physical body, the 1000 00:47:08,389 --> 00:47:11,590 cultural context, the genuine emotion and all 1001 00:47:11,590 --> 00:47:13,980 the beautiful messiness of human interaction, 1002 00:47:14,519 --> 00:47:17,260 just so we can force the voice into a high dimensional 1003 00:47:17,260 --> 00:47:20,920 vector space, turning it into something measurable, 1004 00:47:21,340 --> 00:47:24,460 predictable, and ultimately, sellable. We're 1005 00:47:24,460 --> 00:47:27,239 building these incredibly powerful, globally 1006 00:47:27,239 --> 00:47:30,000 deployed systems based on a highly flawed, deeply 1007 00:47:30,000 --> 00:47:33,159 flattened metaphor of what it actually means 1008 00:47:33,159 --> 00:47:36,739 to be a human being. And that brings us to a 1009 00:47:36,739 --> 00:47:38,539 final pretty chilling thought to leave you with 1010 00:47:38,539 --> 00:47:41,670 as we wrap up this deep dive. Yeah. If artificial 1011 00:47:41,670 --> 00:47:43,989 intelligence inherently relies on flattening 1012 00:47:43,989 --> 00:47:47,909 our messy, beautiful, physical, embodied voices 1013 00:47:47,909 --> 00:47:50,869 into neat mathematical averages in order to function, 1014 00:47:51,789 --> 00:47:53,630 then the real danger isn't that machines will 1015 00:47:53,630 --> 00:47:55,389 eventually figure out how to sound perfectly 1016 00:47:55,389 --> 00:47:58,849 human. No. The real danger is that to survive 1017 00:47:58,849 --> 00:48:01,849 in a world gated by these AI algorithms, whether 1018 00:48:01,849 --> 00:48:04,010 you're applying for a job and your voice is being 1019 00:48:04,010 --> 00:48:06,610 analyzed for fit, or you're calling customer 1020 00:48:06,610 --> 00:48:08,530 service and trying to get the bot to understand 1021 00:48:08,530 --> 00:48:10,909 your frustration, or you're just trying to be 1022 00:48:10,909 --> 00:48:12,989 recognized as competent in your everyday life, 1023 00:48:13,489 --> 00:48:16,369 we will have to start sounding more like machines. 1024 00:48:16,730 --> 00:48:19,030 To survive the system, we will have to adapt 1025 00:48:19,030 --> 00:48:21,809 our own messy footprints to fit perfectly into 1026 00:48:21,809 --> 00:48:25,679 their broken x -ray machines. Exactly. The diagnostic 1027 00:48:25,679 --> 00:48:28,000 muddy waters aren't clearing up anytime soon. 1028 00:48:28,519 --> 00:48:30,460 We're just learning how to drown in them quietly, 1029 00:48:31,059 --> 00:48:33,380 altering our own voices to appease the algorithm. 1030 00:48:34,239 --> 00:48:35,840 Keep that in mind the next time you ask your 1031 00:48:35,840 --> 00:48:38,380 phone for the weather, or leave a voicemail you 1032 00:48:38,380 --> 00:48:40,460 know is being transcribed by a server somewhere. 1033 00:48:41,260 --> 00:48:44,639 Whose voice are you really using? Yours? Or the 1034 00:48:44,639 --> 00:48:45,980 one the machine wants to hear?