[PD] accoustic guitar chord detection

[patrice colet]

  Attached is an attempt to detect 3 notes chords from [adc~], I had to 
enlarge window and peaks number for a better detection and added a part 
that choose the most recurrent harmonics...

  It almost always works on chords played in the middle of the guitar 
neck. However it sometimes mixes the bass between the first note and 
it's subharmonic fifth, and is confused between a major chord and it's 
fifth sus4 chord.



Le 29/03/2017 à 20:11, patrice colet a écrit :
> I've just tried with my electric guitar, and 3 peaks isn't enough to 
> detect all notes from the chords, that's mainly because a guitar chord 
> uses several times the same note at different octaves, and sigmund may 
> detect subharmonics, and first harmonics from the bass strings... I 
> think it's worth to try with at least 12 peaks and remove octaves in a 
> next patch...
>
>
> Le 29/03/2017 à 19:47, Pierre Massat a écrit :
>> Have you tested it with real guitar input ?
>> I've used Pd with my guitar a lot but I never managed to get anything 
>> reliable off sigmund except the base frequency.
>> I'm also very interested if it does work.
>>
>> Cheers,
>>
>> Pierre.
>>
>> 2017-03-29 18:21 GMT+02:00 patrice colet <colet.patrice at free.fr 
>> <mailto:colet.patrice at free.fr>>:
>>
>>     I don't really know what 'fancy' means in this context, here is an
>>     example with [sigmund~], it's supposed to detect 3 notes chords
>>
>>
>>     Le 29/03/2017 à 11:02, Simon Iten a écrit :
>>
>>         this is far from trivial without a hex pickup and i doubt that
>>         something useful will be possible to do with puredata. but i
>>         would be very happy to be proven wrong!
>>
>>             On 29 Mar 2017, at 02:51, Alexandre Torres Porres
>>             <porres at gmail.com <mailto:porres at gmail.com>> wrote:
>>
>>             howdy, getting involved in a research that needs to detect
>>             notes from guitar chords (no hex pickup solutions,
>>             unfortunately). No need to do anything fancy with the
>>             spectra, or process it in any way like with celemony
>>             melodyne's DNA stuff. Do any of you know of some nice
>>             stuff done in Pd or Max or SC or whatever on that?
>>
>>             thanks
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>
>
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