i just did this piece where im emulating the obscure opl2 2-op fm chip. the fm sounds are run through an analog filter and the bassdrum is from an 808. all the patterns are based on 5 versus 12. all recorded on tascam 644 cassette deck.
there is an extensive description on muffwiggler:
http://www.muffwiggler.com/forum/viewtopic.php?p=1595749#1595749]
high res audio:
http://tindeck.com/listen/idwc
soundcloud:
the patch (there is no way to include imgs?):
http://googledrive.com/host/0B1beo8lTIeKlOVlESHpWbkpIR2c/helike.png