Maybe 10 years ago, I caught a program on our classical radio station
featuring Conlon Nancarrow's music and, if I remember correctly, some
interview or discussions concerning the techniques involved with his
compositions.  I know I still have the cassette, so if you're stuck and
would like a copy please send me an e-mail or snail mail and a few
bucks, and I'll be happy to make you a copy.

Steve King - Australia