Vitalik Buterin on Warpcast

Vitalik Buterin pfp

Vitalik Buterin

Device-to-device audio communication (think QR codes, but made out of sound) seems very underrated. Much better UX than QR codes or NFC because you don't have to worry about putting your phone in the exactly right place or pointing it in the right direction. Anyone here with more detailed takes on this?

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Vitalik Buterin pfp

Vitalik Buterin

I feel like there could be a lot of crypto wallet applications.

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Jonathan Shomroni pfp

Jonathan Shomroni

Should be outside of human (and dog) spectrum so it doesn't annoy anyone

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0xLuo pfp

Non-expert personal opinion: Audio communication is susceptible to interference, especially over longer distances. If devices need to be in very close proximity, why not go back to NFC? Perhaps using Bluetooth or WiFi that many devices already have could be a more general choice.

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Max Branzburg pfp

We built this for payments in India on low-end devices, enabling peer-to-peer and merchant payments. App was initially called Tez and is now called Google Pay India. It works! https://www.theverge.com/2017/9/18/16325004/tez-google-india-audio-qr-cash-payments

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Dan Romero pfp

Sonos uses an audio pin to pair a new speaker and your phone.

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Varun Srinivasan pfp

Varun Srinivasan

It would be ideal if you could do it in the high frequency range. Then you could play it on loop and have a really nice UX. But if I remember right this is lossy and it’s very hard to get the error correction right.

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July pfp

I built an app that did this about 10 years ago that did offline TXs. issues we ran into: - poor microphones at the time on android meant (iPhones were fine) we were relegated to them - there’s a lot of noise in the world - bit rate on audible sound spectrum is slow

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✳️ dcposch on daimo pfp

✳️ dcposch on daimo

would love to try it. NFC works amazingly in apple pay--smoothest, fastest experience i've ever had transacting. unfortunately not possible for in-app P2P transactions due to apple restrictions. NFC uses "device" (tapper) & "card" mode (tapped). Android can do both, iPhone apps are only allowed do the former.

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Brian Kim pfp

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GIGAMΞSH pfp

Embedding crypto signatures in audio sounds very fun. I’m imagining R2D2-like conversations or call & response melodies.

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Leo Simon pfp

Beacon technology also seems underrated to me. You can give a free mint to anyone who enters a store and have a specific app downloaded. Could be great for rewards programs.

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Zach pfp

I actually tried to build this with a friend a few years ago. We got a POC, but basically hit a roadblock when we started looking into how lossy/low fidelity speakers and receivers were. It's been a while, tech might've caught up by now.

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Colin Johnson pfp

I’m imagining the entrance to a stadium sounding like a pond full of frogs as everyone passes through the turnstiles 🐸 🔊

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sgt_slaughtermelon🎩 pfp

sgt_slaughtermelon🎩

@sgt-sl8termelon

Is that not precisely what is getting exploited in this scene from Hackers:

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vrypan |--o--| pfp

Is this the 80s all over again? When people would broadcast computer games by playing the tapes they were on, over pirate radio?

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Daniel Fernandes pfp

Daniel Fernandes

Surprised nobody mentioned Clinkle yet. https://d3.harvard.edu/platform-rctom/submission/clinkle-how-to-go-from-a-soon-to-be-unicorn-to-complete-failure-in-one-year/

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Pierre Pauze ↑ 🔵 🎩🚽 pfp

Pierre Pauze ↑ 🔵 🎩🚽

Are there any examples of applications that already exist? Curious to try this out in art exhibitions.

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Joe Blau 🎩 pfp

12 years ago I worked on a using multiple sensors called "Proxignos" — I know horrible name. The idea was to use multiple mobile sensors to statistically improve probability that two devices were in the same location using GPS, accelerometer, camera, a 5 second audio clip, and device time.

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leoclark.⌐◨-◨ ᖽ🎩 pfp

leoclark.⌐◨-◨ ᖽ🎩

A developer friend of mine was working on exactly that many years ago. I will find out what happened.

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