Few days ago I went back to a nice website and found an interesting project:
( that man (or woman) is really talented ! )
I decided to build something similar, a box highly dispensable but so much fun to use.
The main issue I have with that sort of things is to keep the circuit simple. The fact is, you’re always tempted to add a lot of fonctionalities and switches of all kind to increase the sound possibilities but doing so you increase the complexity, the wirring and the resulting headaches.
However, I think I found a comprising solution. One of the joystick will modulate the pitch, the other will modulate the frequency filter’s cut off. The LFO will be able to modulate anything you like (more or less). This isn’t the final schematic (the VCA isn’t the one I’ll use) but it gives the idea :
I wanted to build a PCB but all the parts didn’t want to fit in the limited Free Eagle Area (need to move to Kicad I guess) and I wanted to be sure of the working condition of the circuit. By the way, these OTAs are so fragile…
The other idea is to make that puppy transportable and useable everywhere you could annoy people so a built-in speaker will be added and the use of a battery allowed.
I’m still thinking about the case, certainly an engraved MDF panel which may look like this :