overtone/overtone — pull request #250 by rogerallen (2013-10-16 14:08:28+00:00)
Title: TB-303 synth

Per Sam's request from the Overtone google group: https://groups.google.com/d/msg/overtone/6BzBDEETmEY/fyMvL3fqHtAJ

Add overtone.synth.retro ns to hold historical synths.

Add the Roland TB-303 based on a snippet of Supercollider code by Dan Stowell.