midi splitter

I've been quite busy recently working on my forthcoming book ( 
http://www.oreilly.com/catalog/rtfpg/ ) but I was recently prevailed upon 
to bang out this bit of code, which takes a MIDI file and splits it, i.e., 
for every channel used, the program writes out a new file that contains 
only that channel playing:
http://members.spinn.net/~sburke/midi_splitter.pl

It does this by reading the input file, and then killing notes on any track 
and channel other than the one currently being filtered for -- and it 
iterates thru filtering each of them in turn.  Some may find the program 
interesting.  Feel free to ask questions about parts that puzzle you.
--
Sean M. Burke    http://search.cpan.org/~sburke/