Grid8x8 processing example:

Introduce sensible pulse based on chirp.
The log one have issue with divide by zero by work OK once a song is properly loaded.

Signed-off-by: Piment Noir Task Force <elecdev@piment-noir.org>
Add a file to git for teensy 3.1 portage work.

Signed-off-by: Piment Noir Task Force <elecdev@piment-noir.org>