As Eric Scheirer hasn't picked up on this question (yet), hopefully he
won't mind if I mention his research into just this problem:

http://sound.media.mit.edu/~eds/beat/

He is now making the source-code available for non-commercial research
purposes: from his recent post to the music-dsp list:

"The code is available at
http://sound.media.mit.edu/~eds/beat/tapping.tar.gz
for research purposes only.  You're free to use the code for your
personal experiments or for research work, but if you want to
incorporate
it in a product, you have to license it from MIT (this could be free,
but we'd have to go through the formality).  Please credit me if you
do follow-on work using the software."


Richard Dobson

Dew Drops wrote:
> 
> Does anyone know of a program or something that's been written that can
> take in a piece of music and determine it's tempo ?
> 
> Drew
> 

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