Which reminds me of this (watch the top video if you haven’t seen the Tape ScrubBoard yet):
http://jeremyseanbell.com/scrubboard/video.html
I’m not sure how far Jeremy has gotten with this but it’s seems like a fun retro thing, in slightly new way. This instead of an Octatrack? (OK i guess not, but it would be fun anyway.)
Added: New video – THIS guy is so amazing!!
There are more videos too.