I've been playing around with the idea of creating other waveshapes then square waves for different sound possibilites. Saw and triangle is alot more challenging to produce out of a guitar signal, at least when doing it in an analog fashion.
The Multiwave is the result of alot of developing time. This is actually my third working design. The first one wasn't tracking that good and the second design needed an expensive chip (but actually had a perfect waveshape). So I finally settled with this version, which doesn't perform the best, but only uses common parts so anyone can build it without spending too much.
The 1985 Guitar Synth was released in december, and I didn't reveal what the hidden feature was, but since so many people has asking for it - here's a video about it.
You could probably guess what it is just by looking at the video thumbnail. :)
Coding the hidden feature actually took alot of time. The actual guitar effect code took less then 10% of the program memory, but the tune itself took needed all the remaining space. I even had to cut down the track to make it fit.