hi,
I wrote a little stepsequencer you can check out at http://test.pilot.fm/pd/patches/jass/
0.0.4a is a dynamic-number-of row version it supports loading and saving + a few other neat tricks. Some documentation is included. there are static 8 and 16 row versions in old/ but AFAICT they aren't more stable ;)
it's still a bit buggy but it hardly crashes besides problems with number boxes in test11 and some odd behaviour I tried to document in the bugs section.
test11 (nbx) is required, you also need zexy or at least makesymbol
comments are appreciated.
have fun,
x