Sat Oct 31 09:45:01 CET 2009

Synth: the control layer

A lot of thought went into building the control/virtual-sample 2-task
structure, but apparently not into documenting it, except for
doc/pic18-synth.pdf (from .tex).

I'm just using `sync' from the synth module to provide a time base for
top-level control (duration & beep frequency).  The fancy task
switching is not used.

FIXME: there is no other task.. How come `yield' still works?