I recently started working on making my own synth because I can’t afford to buy one but I have already a Teensy 3.2 with its Audio Board.
So I made a simple polyphonic FM synth, that is also standalone, meaning I can connect my Launchpad to it to play notes without a computer in between.
The setup is really simple, I just have a USB Host chip connected to the Teensy, and then I can plug the Launchpad or any Midi instrument to it via USB.
Here is a demo:
For now I don’t have any potentiometer connected to it to adjust parameters while playing so the envelope and the modulator frequency are fixed but I’m planning on doing that.
I open sourced it on my GitHub. It’s at a very early stage but you can already use it or even contribute:
Let me know your thoughts!