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From: Jannes Faber <jannes.faber@gmail.com>
Date: Wed, 10 Aug 2016 02:17:35 +0200
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To: Daniel Hoffman <danielhoffman699@gmail.com>, 
	Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
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Subject: Re: [bitcoin-dev] BIP Number Request: Addresses over Audio
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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
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> bitcoin-dev mailing list
>>>> bitcoin-dev@lists.linuxfoundation.org
>>>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>>>
>>>>
>>> _______________________________________________
>>> bitcoin-dev mailing list
>>> bitcoin-dev@lists.linuxfoundation.org
>>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>>
>>>
>>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>

--94eb2c1932749202fb0539ac93b7
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<p dir=3D"ltr">Wow. No value judgement, but 1980 called, they want their ra=
dio broadcast for analogue modems back. Both very cool and very cringe wort=
hy.</p>
<p dir=3D"ltr">It sounds quite horrible tbh. Imagine this being as pervasiv=
e as bar and qr codes. And it&#39;s as meaningful and unpleasant to the hum=
an ear as a qr code is to the eye.</p>
<p dir=3D"ltr">Please think of something like using a Mozart symphony as th=
e carrier wave onto which you modulate your signal. Let the notes last a li=
ttle 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&#39;s different every time without being an audiophile=
.</p>
<p dir=3D"ltr">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&#39;t interfere with human speech frequencies so narrator ca=
n keep talking right over it.</p>
<p dir=3D"ltr">I guess it may be tricky because you want your signal to sur=
vive re-encoding as increased playback speeds.</p>
<p dir=3D"ltr">Another consideration: you want a preamble that is very easy=
 to detect, so it doesn&#39;t cost a lot of CPU (battery) to have your podc=
ast player continuously scanning for these things.</p>
<p dir=3D"ltr">Not sure all these wishes are possible at the same time, but=
 surely there&#39;s research around on some?.</p>
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On 10 Aug 2016 1:=
28 a.m., &quot;Daniel Hoffman via bitcoin-dev&quot; &lt;<a href=3D"mailto:b=
itcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.linuxfoundation.org=
</a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 dir=3D"ltr"><div class=3D"gmail_extra">I have updated the GitHub a lot (ch=
anged tones to be less chirpy, fixed some smalls) and made a couple of samp=
les (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&#39;t built=
 a decoder yet, but it seems like the encoder is working properly (looked a=
t Audacity, seems like it is working), and some people on reddit want to <a=
 href=3D"https://www.reddit.com/r/btc/comments/4wsn7v/bip_proposal_addresse=
s_over_audio_thoughts/d69m3st" target=3D"_blank">&quot;allow for decoding e=
xperiments&quot;</a></div><div class=3D"gmail_extra"><br></div><div class=
=3D"gmail_extra">What suggestions do you all have for it?</div><div class=
=3D"gmail_extra"><br></div><div class=3D"gmail_extra"><div class=3D"gmail_q=
uote">On Mon, Aug 8, 2016 at 8:50 PM, Daniel Hoffman <span dir=3D"ltr">&lt;=
<a href=3D"mailto:danielhoffman699@gmail.com" target=3D"_blank">danielhoffm=
an699@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:s=
olid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">=
It wouldn&#39;t be feasible in the vast majority of cases, but I can&#39;t =
think of a reason why it can&#39;t be built into the standard.</div><div><d=
iv><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Aug 8,=
 2016 at 5:59 PM, Trevin Hofmann via bitcoin-dev <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">bitc=
oin-dev@lists.linuxfounda<wbr>tion.org</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:=
1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left=
:1ex"><p dir=3D"ltr">Would it be feasible to transmit an entire BIP21 URI a=
s audio? If you were to encode any extra information (such as amount), it w=
ould be useful to include a checksum for the entire message. This checksum =
could possibly be used instead of the checksum in the address.</p>
<p dir=3D"ltr">Trevin</p><div><div>
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Aug 8, 2016 3:=
06 PM, &quot;Justin Newton via bitcoin-dev&quot; &lt;<a href=3D"mailto:bitc=
oin-dev@lists.linuxfoundation.org" target=3D"_blank">bitcoin-dev@lists.linu=
xfounda<wbr>tion.org</a>&gt; wrote:<br type=3D"attribution"><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;=
border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex=
"><div dir=3D"ltr">Daniel,<div>=C2=A0 =C2=A0Thanks for proposing this.=C2=
=A0 I think this could have some useful use cases as you state.=C2=A0 I was=
 wondering what you would think to adding some additional tones to optional=
ly denote an amount (in satoshis?).</div><div><br></div><div>(FYI, actual l=
ink is here: =C2=A0<a href=3D"https://github.com/Dako300/BIP" target=3D"_bl=
ank">https://github.com/Dako300/BI<wbr>P</a> )</div><div><br></div><div>Jus=
tin</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On=
 Mon, Aug 8, 2016 at 2:22 PM, Daniel Hoffman via bitcoin-dev <span dir=3D"l=
tr">&lt;<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"=
_blank">bitcoin-dev@lists.linuxfounda<wbr>tion.org</a>&gt;</span> wrote:<br=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);=
padding-left:1ex"><div dir=3D"ltr">This is my BIP idea: a fast, robust, and=
 standardized for representing Bitcoin addresses over audio. It takes the b=
inary 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=
.=C2=A0This 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 ca=
pability) that gives me an address automatically would be wonderful for bot=
h the consumer and producer. Comes with error correction built into the pro=
tocol<div><br></div><div>You can see the full specification of the BIP on m=
y GitHub page (<a href=3D"https://github.com/Dako300/BIP-0153" target=3D"_b=
lank">https://github.com/Dako300/BI<wbr>P-0153</a>).<br></div></div>
<br>______________________________<wbr>_________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundat<wbr>ion.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.<wbr>org=
/mailman/listinfo/bitcoin-d<wbr>ev</a><br>
<br></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div dat=
a-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div=
><div dir=3D"ltr"><div><div dir=3D"ltr"><div dir=3D"ltr"><div><div style=3D=
"font-size:12px"><font color=3D"#43aaff" face=3D"Futura"><br></font></div><=
div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px"><f=
ont face=3D"Futura" color=3D"#0795b1">Justin W. Newton</font></div><div sty=
le=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px"><font face=3D"=
Futura" color=3D"#0795b1">Founder/CEO</font></div><div style=3D"color:rgb(0=
,0,0);font-family:Helvetica;font-size:12px"><font face=3D"Futura" color=3D"=
#0795b1">Netki, Inc.</font></div><div style=3D"color:rgb(0,0,0);font-family=
:Helvetica;font-size:12px"><font face=3D"Futura" color=3D"#0795b1"><br></fo=
nt></div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12p=
x"><font face=3D"Futura" color=3D"#0795b1"><a href=3D"mailto:justin@netki.c=
om" style=3D"color:rgb(17,85,204)" target=3D"_blank">justin@netki.com</a></=
font></div><div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:1=
2px"><font face=3D"Futura" color=3D"#0795b1"><a href=3D"tel:+1.818.261.4248=
" value=3D"+18186258220" style=3D"color:rgb(17,85,204)" target=3D"_blank">+=
1.818.261.4248</a></font></div><img height=3D"62" width=3D"250" src=3D"cid:=
E0A6097C-DC31-4735-8626-14DED800B4E6@gid.net"><br></div></div><div><br></di=
v></div></div></div></div></div></div></div></div></div>
</div>
<br>______________________________<wbr>_________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundat<wbr>ion.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.<wbr>org=
/mailman/listinfo/bitcoin-d<wbr>ev</a><br>
<br></blockquote></div></div>
</div></div><br>______________________________<wbr>_________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundat<wbr>ion.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.<wbr>org=
/mailman/listinfo/bitcoin-d<wbr>ev</a><br>
<br></blockquote></div><br></div>
</div></div></blockquote></div><br></div></div>
<br>______________________________<wbr>_________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.=
<wbr>linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.<wbr>org=
/mailman/listinfo/bitcoin-<wbr>dev</a><br>
<br></blockquote></div></div>

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