Smart Speakers Podcast
Smart Speakers Podcast

Smart Speakers Podcast

Dave Zohrob & Harish Agarwal

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Episodes

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A podcast about Voice AI hosted by Dave Zohrob and Harish Agarwal, the cofounders of Chartable (acquired by Spotify in 2022). We interview founders, technologists, and investors at the frontier of voice AI applications, and share our startup journey along the way. More at https://smartspeakers.fm

www.smartspeakers.fm

Recent Episodes

The 500ms Dash—Nikhil Gupta, VAPI
APR 7, 2025
The 500ms Dash—Nikhil Gupta, VAPI
<p>Nikhil Gupta is the cofounder and CTO of VAPI. He’s been in the trenches building and scaling one of the biggest voice platforms in the world.</p><p>On this episode, he explains how VAPI aims to create a voice-default future where we talk to all our computers—and goes deep into every step of VAPI’s voice pipelines and the technical challenges along the way.</p><p>Some highlights:</p><p>☎️ <strong>Massive scale: </strong>VAPI has processed 44 million voice calls on their platform, growing from a COVID-era one-click Zoom meeting button to a full voice infrastructure company used by thousands of developers.</p><p>⚡️ <strong>Latency matters:</strong> Voice AI needs to respond within 500 milliseconds to feel natural to humans. That means cleaning audio, detecting when users are done speaking, transcribing text, generating responses, converting to speech, and handling interruptions—all within a fraction of a second.</p><p>🗣️<strong>Voice-first future: </strong>Nikhil is betting a future where voice becomes our default interface with all computing systems.</p><p>If you’ve ever wondered how voice API actually works—this is the episode for you. </p><p><strong>Chapters</strong></p><p>00:00 - Introducing VAPI</p><p>04:42 - Pivoting through COVID</p><p>05:42 - ChatGPT existential crisis</p><p>08:33 - Technical challenges of voice</p><p>12:42 - Anatomy of a voice call</p><p>14:46 - Knowing when someone is done speaking</p><p>18:37 - Routing to the fastest model</p><p>22:07 - Knowledge and context injection</p><p>26:47 - The text-to-speech bottleneck</p><p>31:14 - Handling interruptions gracefully</p><p>33:43 - The 500-millisecond barrier</p><p>36:56 - The DNS latency discovery</p><p>39:25 - Scaling the team and what's next</p><p><strong>Links</strong></p><p>* <a target="_blank" href="https://vapi.ai/">VAPI</a> </p><p>* <a target="_blank" href="https://www.linkedin.com/in/nikhilro/">Nikhil Gupta on LinkedIn</a></p><p>* <a target="_blank" href="https://www.producthunt.com/products/vapi">VAPI on Product Hunt</a></p><p>* <a target="_blank" href="https://stratechery.com/">Stratechery by Ben Thompson</a> - Recommended reading from Nikhil</p> <br/><br/>This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit <a href="https://www.smartspeakers.fm?utm_medium=podcast&#38;utm_campaign=CTA_1">www.smartspeakers.fm</a>
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43 MIN
Your AI interviewer will see you now—Varun Khurana, Wayfaster
MAR 31, 2025
Your AI interviewer will see you now—Varun Khurana, Wayfaster
<p>Varun Khurana wants every job candidate to have the best possible chance to prove themselves for every job they apply to. He’s been in the trenches building with voice AI for 2+ years, and had some great nuggets to share:</p><p>* <strong>💬 How Wayfaster started: </strong>“Wayfaster started out as a way to interview your entire pipeline in a couple seconds... the only way you can really do that is using voice AI."</p><p>* <strong>⛔️Why AI video avatars are a no-go: </strong>"We tried avatars and every candidate hated it... I think it just makes candidates feel dumb. It's just like, why am I talking to an avatar? Like how stupid do you think I am?"</p><p>* <strong>📑How AI interviews give candidates a chance: </strong>"Candidates have just gotten really accustomed to getting this default auto-reject email... At least here, I know that if I do a good job on the interview, I have a shot at this opportunity."</p><p>* <strong>🐻Why he’s bearish consumer voice AI: </strong>"I'm actually a little more bearish on the consumer voice AI use cases. I like voice AI in constrained environments, like B2B, there's an amount of intent... I don't think people are going to want to be talking to their phones all the time."</p><p>Hope you enjoy the conversation! As always you can subscribe at https://smartspeakers.fm.</p><p>Chapters</p><p>0:00 Welcome and intro</p><p>1:32 First big AI aha moment</p><p>5:08 Career background</p><p>7:40 Exploring startup ideas</p><p>10:34 How WayFaster was born</p><p>14:21 Initial target markets</p><p>16:45 Candidate response to AI interviews</p><p>19:07 Benefits for recruiters and candidates</p><p>23:30 How AI is transforming recruiting</p><p>26:51 The two-sided recruiting game</p><p>31:05 Why Varun is bearish on consumer voice AI</p><p>35:09 Future generations and AI adoption</p><p>38:09 Content recommendations and closing</p><p></p><p>Links</p><p>* <a target="_blank" href="https://wayfaster.com">WayFaster Website</a>: wayfaster.com</p><p>* <a target="_blank" href="https://www.linkedin.com/in/vkhurana2/">Varun Khurana on LinkedIn</a>: <a target="_blank" href="https://www.linkedin.com/in/vkhurana2/">https://www.linkedin.com/in/vkhurana2/</a></p><p>* <a target="_blank" href="https://www.southparkcommons.com/">South Park Commons</a></p><p>* <a target="_blank" href="https://deepgram.com/">Deepgram</a></p><p>* <a target="_blank" href="https://charlesrubenfeld.substack.com/">Charles Rubenfeld's Newsletter</a></p> <br/><br/>This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit <a href="https://www.smartspeakers.fm?utm_medium=podcast&#38;utm_campaign=CTA_1">www.smartspeakers.fm</a>
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39 MIN
The pipeline for voice—Kwindla Hultman Kramer, CEO of Daily
MAR 24, 2025
The pipeline for voice—Kwindla Hultman Kramer, CEO of Daily
<p>Much of my childhood was spent in my basement, dialing up other people’s computers to trade messages and play games.</p><p>Kwin Kramer from Daily remembers that time, too—and says today's voice AI moment feels just like those early internet days. That sense of endless possibilities is back.</p><p>His open-source project PipeCat has become the standard toolkit for voice agents. What began as an experiment now powers voice AI for OpenAI, Google DeepMind, and countless startups, making conversations feel natural and responsive.</p><p>Some highlights:</p><p>* That early internet feeling is back: "1995 to 1999 felt a certain way. It never felt that way again until 2023 to 2025."</p><p>* GPT-4 transformed Daily's business by removing a key bottleneck: "Previously you needed two humans for a conversation. Now you only need one, maybe not even that."</p><p>* Voice AI's killer feature? Latency matters: "If response times are long, you're in that uncanny valley where people get uncomfortable."</p><p>* Kwin's bold prediction: "We're all going to have friends in our group chats that aren't human because LLMs are actually really entertaining."</p><p>Hope you enjoy it as much as we did.</p><p><strong>Links</strong></p><p>Daily: https://daily.co/PipeCat: https://pipecat.ai/Kwin on Twitter: https://twitter.com/kwindla</p><p><strong>Chapters</strong></p><p>0:00 Intro</p><p>2:02 First AI aha moment</p><p>5:43 MIT Media Lab beginnings</p><p>9:05 BBS and door games</p><p>15:26 The AllAfrica journey</p><p>18:54 Starting Daily</p><p>21:13 COVID's impact on WebRTC</p><p>22:36 GPT-4 transformation</p><p>31:26 Building voice for LLMs</p><p>35:17 PipeCat's key challenges</p><p>44:10 The future of speech-to-speech</p><p>47:10 Voice AI adoption trends</p><p>52:34 Vibe coding revolution</p><p>56:11 What's next for PipeCat</p> <br/><br/>This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit <a href="https://www.smartspeakers.fm?utm_medium=podcast&#38;utm_campaign=CTA_1">www.smartspeakers.fm</a>
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57 MIN
The craft behind voice AI magic with Tom Shapland
MAR 17, 2025
The craft behind voice AI magic with Tom Shapland
<p>This week, Tom Shapland shares his journey from agriculture tech to founding Canonical, a tool that helps voice AI developers understand and improve conversations by mapping call stages.</p><p>Tom has deep experience in the voice world—we loved this conversation and we’re sure you will too!</p><p><strong>Links</strong></p><p>https://canonical.chathttps://x.com/Tom_Shaplandhttps://www.linkedin.com/in/tom-shapland-b4494212/</p><p></p><p><strong>Chapters</strong></p><p>0:00 - Intro</p><p>1:05 - Welcome and first AI moment</p><p>3:03 - Computer vision for thirsty plants</p><p>5:50 - Explaining AI to farmers</p><p>7:52 - Hardware is hard</p><p>8:31 - Non-VC shaped business struggles</p><p>16:51 - Starting a new company</p><p>19:41 - From metrics to conversation stages</p><p>22:42 - Voice AI evolution</p><p>26:40 - Balancing determinism and freedom</p><p>29:53 - Who uses Canonical and when</p><p>32:39 - Don't make your agent spell anything</p><p>35:52 - Zero to 80% is easy, production is hard</p><p>39:28 - Future of voice AI adoption</p><p>42:21 - Book recommendations and closing</p> <br/><br/>This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit <a href="https://www.smartspeakers.fm?utm_medium=podcast&#38;utm_campaign=CTA_1">www.smartspeakers.fm</a>
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45 MIN
Olivia Moore, a16z: Voice as a wedge
MAR 10, 2025
Olivia Moore, a16z: Voice as a wedge
<p>Voice AI is having its moment, but pretty soon every company will be a voice company.</p><p>Olivia Moore is the author of a16z’s<a target="_blank" href="https://a16z.com/ai-voice-agents-2025-update/"> market report on voice AI agents</a>, which is a must-read if you’re interested in the space. </p><p>She’s an amazing thinker and we cover a lot in this conversation, including:</p><p>* Olivia's thesis that Voice AI is in it’s “internet in 1999” moment</p><p>* The "wedge" strategy: using Voice AI to get in the door before transforming broader business operations</p><p>* How recruiting became a surprising early adopter of Voice AI (candidates actually prefer it)</p><p>* Voice AI's unique ability to handle compliance and stay on-script in regulated industries</p><p>* Shifting from per-minute pricing to transaction-based fees or success metrics</p><p>* Why big tech platforms (OpenAI, Google) won't dominate vertical-specific voice applications</p><p><strong>Links</strong></p><p>* Olivia on X: <a target="_blank" href="https://x.com/omooretweets">https://x.com/omooretweets</a> (must-follow!)</p><p>* Her <a target="_blank" href="https://a16z.com/ai-voice-agents-2025-update/">market report on voice AI agents</a></p><p>* <a target="_blank" href="https://classicreload.com/dr-sbaitso.html">Dr Sbaitso emulator</a> - this was packaged with new Sound Blaster sound cards! Strange stuff.</p><p><strong>Chapters</strong>0:00 Intro and welcome1:24 Olivia's first AI "aha" moments 3:42 Coolest non-voice AI tools6:29 How Olivia got into the Voice AI space10:03 From consumer to enterprise13:50 DMV-bot16:22 Voice AI as a wedge20:57 Traction in the voice market24:24 Voice AI for recruiting28:59 Why AI doesn't go off-script31:03 Better experiences for candidates and customers33:24 The future of call centers37:02 Bear cases for Voice AI41:25 Open problems44:29 Pricing47:12 Working with twin sister Justine50:11 Three things Olivia's excited about </p><p><strong>Subscribe</strong> and listen: https://smartspeakers.fm</p> <br/><br/>This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit <a href="https://www.smartspeakers.fm?utm_medium=podcast&#38;utm_campaign=CTA_1">www.smartspeakers.fm</a>
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55 MIN