I've been sidetracked recently into beta testing the new unreleased Teensy-LC from PJRC, and building an Adafruit Untztrument with Teensy-LC at its core. More on that in another project another time.

But I have contributed a 2way, 8 way and 16 way mixer back to the audio project which should clean up my design no end, as well as increasing sound quality. The beatmaker is already running the new code and works like a charm.

BEen having interrupt struggles with the sequencer. I'm sure the solution will present itself to me in a moment of insanity, as is usual.