Vitalik Buterin pfp
Vitalik Buterin
@vitalik.eth
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
@vitalik.eth
I feel like there could be a lot of crypto wallet applications.
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Jonathan Shomroni pfp
Jonathan Shomroni
@shomroni
Should be outside of human (and dog) spectrum so it doesn't annoy anyone
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0xLuo pfp
0xLuo
@0xluo.eth
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
Max Branzburg
@max
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
Dan Romero
@dwr.eth
Sonos uses an audio pin to pair a new speaker and your phone.
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July pfp
July
@july
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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Varun Srinivasan pfp
Varun Srinivasan
@v
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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✳️ dcposch on daimo pfp
✳️ dcposch on daimo
@dcposch.eth
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
Brian Kim
@brianjckim
👀
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GIGAMΞSH pfp
GIGAMΞSH
@gigamesh
Embedding crypto signatures in audio sounds very fun. I’m imagining R2D2-like conversations or call & response melodies.
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Zach pfp
Zach
@zherring
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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sgt_slaughtermelon🎩 pfp
sgt_slaughtermelon🎩
@sgt-sl8termelon
Is that not precisely what is getting exploited in this scene from Hackers:
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Colin Johnson 💭 pfp
Colin Johnson 💭
@cojo.eth
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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vrypan |--o--| pfp
vrypan |--o--|
@vrypan.eth
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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0xChris pfp
0xChris
@0xchris
Radio industry uses a sub-sonic frequency with a SMPTE-like timecode to measure listenership. Think QR audio as a never-ending radioprint for FM stations. This is the foundation of Nielsen PPM.
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Branksy Pop pfp
Branksy Pop
@branksypop
In this app whistling 2600hz should shut down the phone though. JustForFun
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Daniel Fernandes pfp
Daniel Fernandes
@dfern.eth
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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vrypan |--o--| pfp
vrypan |--o--|
@vrypan.eth
It might be interesting to check the history of CueCat. https://web.archive.org/web/20001017162623/http://www.businessweek.com/bwdaily/dnflash/sep2000/nf20000928_029.htm (scan for "audio" in the article.) For some reason I have the impression that Amazon bought them eventually.
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nir.eth 🌿🟣🐦☁️ pfp
nir.eth 🌿🟣🐦☁️
@nir
Any good examples out in the wild?
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