Re: Software for chord identification

[Leon van Noorden <leonvannoorden@xxxxxxxxx>]

Eric,

I find this an interesting problem. As far as I know there is no specific
software to solve this problem. I will talk to the people that look after
the digitalisation of old recordings of African music in Brussels. They must
face the same problem. 

We started this year a project on Music and Movement. I will think about how
we could answer your question from that angle. There must be a relation with
the resonance curve in rhythm perception and/or production that Van Noorden
& Moelants have proposed. 

What kind of music is relevant in your case?

Leon



-----Message d'origine-----
De : AUDITORY Research in Auditory Perception
[mailto:AUDITORY@xxxxxxxxxxxxxxx] De la part de Eric Jacobs
Envoyé : donderdag 8 september 2005 0:22
À : AUDITORY@xxxxxxxxxxxxxxx
Objet : Re: Software for chord identification

I apologize if my post was not more clearly worded.  I'll try to do
better:

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") - I can
adjust the recording speed as required to reproduce the ideal chord.

So to your reply of "it must be possible to find a turntable speed...",
the question is "what tools are available to help one find that speed",
particularly if one is relatively tone deaf.

What temporal aspects make the most sense to look at to identify the
correct speed?  And what tools are out there to measure those
temporal aspects and relate them to correct values?

Thanks!

Eric


-----Original Message-----
From: Leon van Noorden [mailto:leonvannoorden@xxxxxxxxx]
Sent: Wednesday, September 07, 2005 2:50 PM
To: AUDITORY@xxxxxxxxxxxxxxx
Cc: ericj@xxxxxxxxxxxxxxxxxxx
Subject: RE: Software for chord identification


I don't understand this question. The tones in a chord changes also with the
change in turntable speed. I think it is much better to study the temporal
aspects of the music. Not all temporal aspects (such as musical phrases
versus trills etc) change in the same way if one plays a piece faster or
slower (I mean in reality, before recording it). From this it must be
possible to find a turntable speed where all the temporal aspects seem to
sound natural. This must then be the original speed.

Leon van Noorden

-----Message d'origine-----
De : AUDITORY Research in Auditory Perception
[mailto:AUDITORY@xxxxxxxxxxxxxxx] De la part de Eric Jacobs
Envoyé : woensdag 7 september 2005 20:31
À : AUDITORY@xxxxxxxxxxxxxxx
Objet : Software for chord identification

Is there software for tone deaf people that can analyze a
segment of digitized sound and report the chord(s)?  The
specific application is in sound restoration, for recorded
music that was recorded at an unknown speed, and needs
to be "repitched".  This is often the case with older
78 RPM records, where the actual playback speed can range
anywhere from 68 to 90 RPM.

Eric Jacobs
The Audio Archive
Lexington, MA
USA
mailto:EricJ@xxxxxxxxxxxxxxxxxxx