Re: [bitcoin-dev] BIP Number Request: Addresses over Audio

From: Jannes Faber <jannes.faber@gmail•com>
To: Daniel Hoffman <danielhoffman699@gmail•com>,
	 Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP Number Request: Addresses over Audio
Date: Wed, 10 Aug 2016 02:17:35 +0200	[thread overview]
Message-ID: <CABeL=0hrGpSZx+Y5vAKSOoZMrpZ3OgWSbdq_Sj-PWSt0j_H23Q@mail.gmail.com> (raw)
In-Reply-To: <CAL9WuQXsbBJ0UwdS+o=UqJCcsebcPa9Ug5A=uNtc6Z+9CNEFPg@mail.gmail.com>

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Wow. No value judgement, but 1980 called, they want their radio broadcast
for analogue modems back. Both very cool and very cringe worthy.

It sounds quite horrible tbh. Imagine this being as pervasive as bar and qr
codes. And it's as meaningful and unpleasant to the human ear as a qr code
is to the eye.

Please think of something like using a Mozart symphony as the carrier wave
onto which you modulate your signal. Let the notes last a little longer to
represent a 1 bit. Or change the tempo. Or add an echo. Make it so the
listener can interpret it as a generic not too annoying tune and not even
realise it's different every time without being an audiophile.

Maybe have a 100 different base tunes from mozart to hiphop so the user can
pick one suitable to their audience and context. Maybe have some that don't
interfere with human speech frequencies so narrator can keep talking right
over it.

I guess it may be tricky because you want your signal to survive
re-encoding as increased playback speeds.

Another consideration: you want a preamble that is very easy to detect, so
it doesn't cost a lot of CPU (battery) to have your podcast player
continuously scanning for these things.

Not sure all these wishes are possible at the same time, but surely there's
research around on some?.

On 10 Aug 2016 1:28 a.m., "Daniel Hoffman via bitcoin-dev" <
bitcoin-dev@lists•linuxfoundation.org> wrote:

> I have updated the GitHub a lot (changed tones to be less chirpy, fixed
> some smalls) and made a couple of samples (see attachment for MP3 and FLAC
> of both tone tables, first 16 then 4). Is this good enough to warrant an
> official BIP number? I haven't built a decoder yet, but it seems like the
> encoder is working properly (looked at Audacity, seems like it is working),
> and some people on reddit want to "allow for decoding experiments"
> <https://www.reddit.com/r/btc/comments/4wsn7v/bip_proposal_addresses_over_audio_thoughts/d69m3st>
>
> What suggestions do you all have for it?
>
> On Mon, Aug 8, 2016 at 8:50 PM, Daniel Hoffman <danielhoffman699@gmail•com
> > wrote:
>
>> It wouldn't be feasible in the vast majority of cases, but I can't think
>> of a reason why it can't be built into the standard.
>>
>> On Mon, Aug 8, 2016 at 5:59 PM, Trevin Hofmann via bitcoin-dev <
>> bitcoin-dev@lists•linuxfoundation.org> wrote:
>>
>>> Would it be feasible to transmit an entire BIP21 URI as audio? If you
>>> were to encode any extra information (such as amount), it would be useful
>>> to include a checksum for the entire message. This checksum could possibly
>>> be used instead of the checksum in the address.
>>>
>>> Trevin
>>>
>>> On Aug 8, 2016 3:06 PM, "Justin Newton via bitcoin-dev" <
>>> bitcoin-dev@lists•linuxfoundation.org> wrote:
>>>
>>>> Daniel,
>>>>    Thanks for proposing this.  I think this could have some useful use
>>>> cases as you state.  I was wondering what you would think to adding some
>>>> additional tones to optionally denote an amount (in satoshis?).
>>>>
>>>> (FYI, actual link is here:  https://github.com/Dako300/BIP )
>>>>
>>>> Justin
>>>>
>>>> On Mon, Aug 8, 2016 at 2:22 PM, Daniel Hoffman via bitcoin-dev <
>>>> bitcoin-dev@lists•linuxfoundation.org> wrote:
>>>>
>>>>> This is my BIP idea: a fast, robust, and standardized for representing
>>>>> Bitcoin addresses over audio. It takes the binary representation of the
>>>>> Bitcoin address (little endian), chops that up into 4 or 2 bit chunks
>>>>> (depending on type, 2 bit only for low quality audio like american
>>>>> telephone lines), and generates a tone based upon that value. This started
>>>>> because I wanted an easy way to donate to podcasts that I listen to, and
>>>>> having a Shazam-esque app (or a media player with this capability) that
>>>>> gives me an address automatically would be wonderful for both the consumer
>>>>> and producer. Comes with error correction built into the protocol
>>>>>
>>>>> You can see the full specification of the BIP on my GitHub page (
>>>>> https://github.com/Dako300/BIP-0153).
>>>>>
>>>>> _______________________________________________
>>>>> bitcoin-dev mailing list
>>>>> bitcoin-dev@lists•linuxfoundation.org
>>>>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Justin W. Newton
>>>> Founder/CEO
>>>> Netki, Inc.
>>>>
>>>> justin@netki•com
>>>> +1.818.261.4248
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>>>
>>>>
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>>>
>>
>
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