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FWIW, Ableton (software DAW on Windows and Mac) does have that feature -
the "Harmony to Midi" function will generate polyphonic Midi from any Audio
source.
However:
- It's far from realtime - it is very much an offline process. Consumes
alot of CPU, and takes a long time at that.
- It is certainly not infallible - its accuracy depends on the overtones
in the audio stream from whatever instrument(s) were used, the attack of
the notes, any modulation, etc. etc. So typically, you will spend time
deleting "false triggers" in the generated midi - and I notice that any
low-frequency notes detected are often a semitone off. It does however
generate midi that matches up in the timeline with the source audio, and it
can produce interesting chords from the source audio...
Then there's Celemony Melodyne - again, software. I don't own it, but
afaik, it does do the audio->midi thing.
There may well be iPad apps or similar that purport to doing similar. You
might want to investigate that if its an option.
On Thu, Mar 15, 2018 at 10:28 AM, Daniel Forr=C3=B3 [email protected]
[midiguitar] <[email protected]> wrote:
>
>
> It is not technically possible to realize, yet=E2=80=A6 Maybe in far futu=
re with
> very advanced AI=E2=80=A6
>
> Until then, we have to use our well trained ears and knowledge of music
> theory, and some of us have perfect pitch which is helpful, too :-)
>
> Daniel Forro
>
>
> On Mar 15, 2018, at 17:19, 'Michael Peters' [email protected] [midiguitar] <
> [email protected]> wrote:
>
> does anyone know if there is a fast, hardware based, polyphonic
> audio-2-midi converter? not for guitar, and I'm not interested in the
> new Roland guitar synths - I want a small dedicated box that does just th=
at
> - input =3D audio, output =3D midi, with any kind of audio input.
>
> -Michael
>
>
>=20
>
--=20
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<div dir=3D"ltr">
<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:s=
mall;font-style:normal;font-variant-ligatures:normal;font-variant-caps:norm=
al;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;t=
ext-transform:none;white-space:normal;word-spacing:0px;background-color:rgb=
(255,255,255);text-decoration-style:initial;text-decoration-color:initial;f=
loat:none;display:inline">FWIW, Ableton (software DAW on Windows and Mac) d=
oes have that feature - the "Harmony to Midi" function will gener=
ate polyphonic Midi from any Audio source.=C2=A0</span><div style=3D"color:=
rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:norma=
l;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;le=
tter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;wh=
ite-space:normal;word-spacing:0px;text-decoration-style:initial;text-decora=
tion-color:initial">However:</div><div style=3D"color:rgb(34,34,34);font-fa=
mily:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatu=
res:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;t=
ext-align:start;text-indent:0px;text-transform:none;white-space:normal;word=
-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">=
=C2=A0 - It's far from realtime - it is very much an offline process. C=
onsumes alot of CPU, and takes a long time at that.</div><div style=3D"colo=
r:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:nor=
mal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;text-decoration-style:initial;text-deco=
ration-color:initial">=C2=A0 - It is certainly not infallible - its accurac=
y depends on the overtones in the audio stream from whatever instrument(s) =
were used, the attack of the notes, any modulation, etc. etc. So typically,=
you will spend time deleting "false triggers" in the generated m=
idi - and I notice that any low-frequency notes detected are often a semito=
ne off. It does however generate midi that matches up in the timeline with =
the source audio, and it can produce interesting chords from the source aud=
io...</div><div style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;f=
ont-size:small;font-style:normal;font-variant-ligatures:normal;font-variant=
-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-in=
dent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decor=
ation-style:initial;text-decoration-color:initial"><br></div><div style=3D"=
color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style=
:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:=
400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:n=
one;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-=
decoration-color:initial">Then there's Celemony Melodyne - again, softw=
are. I don't own it, but afaik, it does do the audio->midi thing.</d=
iv><div style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size=
:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:no=
rmal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px=
;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-st=
yle:initial;text-decoration-color:initial"><br></div><div style=3D"color:rg=
b(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;=
font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;lett=
er-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whit=
e-space:normal;word-spacing:0px;text-decoration-style:initial;text-decorati=
on-color:initial">There may well be iPad apps or similar that purport to do=
ing similar. You might want to investigate that if its an option.</div><div=
style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;=
font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;fo=
nt-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-t=
ransform:none;white-space:normal;word-spacing:0px;text-decoration-style:ini=
tial;text-decoration-color:initial"><br></div><div style=3D"color:rgb(34,34=
,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-va=
riant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spac=
ing:normal;text-align:start;text-indent:0px;text-transform:none;white-space=
:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-colo=
r:initial"><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">On Thu, Mar 15, 2018 at 10:28 AM, Daniel Forr=C3=B3 <a href=3D"ma=
ilto:[email protected]">[email protected]</a> [midiguitar] <span dir=3D"l=
tr"><<a href=3D"mailto:[email protected]" target=3D"_blank">mid=
[email protected]</a>></span> wrote:<br><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex">
<u></u>
=20
<div style=3D"background-color:#fff">
<span style=3D"display:none">=C2=A0</span>
<div id=3D"m_4084902457329083450ygrp-mlmsg">
<div id=3D"m_4084902457329083450ygrp-msg">
<div id=3D"m_4084902457329083450ygrp-text">
=20=20=20=20=20=20
=20=20=20=20=20=20
<p></p><div><div>It is not technically possible to realize, yet=E2=80=
=A6 Maybe in far future with very advanced AI=E2=80=A6</div><div><br></div>=
<div>Until then, we have to use our well trained ears and knowledge of musi=
c theory, and some of us have perfect pitch which is helpful, too :-)</div>=
<div><br></div><div>Daniel Forro</div><span class=3D""><br><div><br><blockq=
uote type=3D"cite"><div>On Mar 15, 2018, at 17:19, 'Michael Peters'=
<a href=3D"mailto:[email protected]" target=3D"_blank">[email protected]</a> [midi=
guitar] <<a href=3D"mailto:[email protected]" target=3D"_blank"=
>[email protected]</a>> wrote:</div><br class=3D"m_408490245732=
9083450Apple-interchange-newline"><div><span style=3D"color:rgb(31,73,125);=
font-family:Calibri,sans-serif;font-size:11pt;background-color:rgb(255,255,=
255)">does anyone know if there is a fast, hardware based, polyphonic audio=
-2-midi converter?</span>=C2=A0<span style=3D"color:rgb(31,73,125);font-fam=
ily:Calibri,sans-serif;font-size:11pt">=C2=A0</span><span style=3D"color:rg=
b(31,73,125);font-family:Calibri,sans-serif;font-size:11pt;background-color=
:rgb(255,255,255)">not for guitar, and I'm not interested in the new Ro=
land guitar synths - I want a small dedicated box that does just that - inp=
ut =3D audio, output =3D midi, with any kind of audio input.</span><br><div=
class=3D"m_4084902457329083450WordSection1" style=3D"font-family:Helvetica=
;font-size:12px;font-style:normal;font-weight:normal;letter-spacing:normal;=
text-align:start;text-indent:0px;text-transform:none;white-space:normal;wor=
d-spacing:0px"><div style=3D"padding:15px 0px 3px;overflow:hidden;margin:0c=
m 0cm 0.0001pt;font-size:12pt;font-family:"Times New Roman",serif=
"><span lang=3D"EN-US" style=3D"font-size:11pt;font-family:Calibri,sans-ser=
if;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></div><div style=3D"pad=
ding:15px 0px 3px;overflow:hidden;margin:0cm 0cm 0.0001pt;font-size:12pt;fo=
nt-family:"Times New Roman",serif"><span lang=3D"EN-US" style=3D"=
font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">-Michae=
l<u></u><u></u></span></div></div></div></blockquote></div><br></span></div=
><p></p>
</div>
=20=20=20=20=20
=20=20=20=20
<div style=3D"color:#fff;height:0"></div>
</div>
=20=20
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><s=
pan style=3D"color:rgb(51,51,51);line-height:17px">( =CD=A1=C2=B0 =CD=9C=CA=
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