Ewisynth pitch/envelope tracking demo

Quick and shaky demo of the new pitch and (still buggy) envelope follower feature in the new [ewisynth](https://github.com/dingodoppelt/ewisynth). Ewisynth is harmonizing the lead guitar by following the guitar's pitch and loudness envelope. Envelope is routed to waveshape, filter cutoff and level. The rotator plays a different voicing from a predefined bank of voicings with every new note recognized (in theory ;)) *Musical disclaimer: this is only a bunch of random, meaningless, misplaced notes just for the sake of trying my new synth's features on guitar*