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Re: Software for chord identification

Hi Eric,
You may check the large amount of work within music information retrieval as one thread there is to extract musical features with audio (e.g. ISMIR conference site). For example Emilia Gomez and Jordi Bonada from UPF in Barcelona presented at ICMC (last week) a system for real time visualization of the predicted chord analysis from audio. I think it also included a prediction of tuning. If you know the score you're done...
Anders Friberg

Eric Jacobs wrote:

At least for classical pieces, yes, sheet music (to the extent
that A440 was used, or other known historical pitches for A).

Of course, as was pointed out earlier, for popular music the
pitch may have been changed for vanity purposes, and any sheet
music has limited value if any at all.  So in these cases, an
"ideal chord" is not known.

The problem of correctly repitching historical recordings is very common in the audio restoration field. For electric recordings, the presence of an electrical ground hum is very
helpful, but for the early acoustic recordings there are no electrically induced noises.


---- Original message ----

Date: Thu, 8 Sep 2005 10:42:46 +0200 (CEST)
From: Toth Laszlo <tothl@xxxxxxxxxxxxxxx> Subject: Re: Software for chord identification To: Eric Jacobs <ericj@xxxxxxxxxxxxxxxxxxx>
Cc: AUDITORY@xxxxxxxxxxxxxxx

On Wed, 7 Sep 2005, Eric Jacobs wrote:

If I know what chord is being played (call this "actual chord") - and I
do know what chord should be played (call this "ideal chord") -

What do you mean by knowing the "ideal" chord? Sheet music?

             Laszlo Toth
      Hungarian Academy of Sciences         *
Research Group on Artificial Intelligence   *   "Failure only begins
   e-mail: tothl@xxxxxxxxxxxxxxx            *    when you stop trying"
   http://www.inf.u-szeged.hu/~tothl        *