waves: inner-loop oscillator optimizations
waves: add customized svf sources and slew header. change lots of stuff to fix16 and add mix functions. just barely killing the CPU per-frame, next commit will fix it in one of a couple ways.
waves: compile fixes, don't process adc mix for now
Merge branch 'dev' of https://github.com/tehn/aleph into dev
bees: added op_list16, some cleanup along the way
bees: fix typo in op enum