I recently started working on making my own synth because I canít 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 donít have any potentiometer connected to it to adjust parameters while playing so the envelope and the modulator frequency are fixed but Iím planning on doing that.

I open sourced it on my GitHub. Itís at a very early stage but you can already use it or even contribute:

Let me know your thoughts!