[linux-audio-user] ams PCM input?

[David Cournapeau]

Erik de Castro Lopo wrote:

>On Wed, 19 Jan 2005 13:56:59 +0900
>David Cournapeau <cournape at enst.fr> wrote:
>
>  
>
>>It is way more difficult than that. Finding the pitch of a signal, even 
>>monophonic, is *very* tricky, for real instruments.
>>    
>>
>
>Accuracy, speed, reliability; pick one and you'd be lucky to get 50%
>of what you want :-).
>
>Erik
>  
>
If you are willing to give up on speed (I mean really giving up on 
speed, ie being ready to wait for several seconds for one second of 
sound on a modern computer), matching pursuit with harmonic atoms works 
really well from my experience. I could find the different notes of one 
piano chord with a "good" accuracy.

See a description here 
http://www.irisa.fr/metiss/gribonval/Papers/2003/IEEESP/harmonicMP.pdf

David