it is very eminently not polyphonic though.
@covertneko and i had an interesting discussion about how polyphonic synthesizers deal with not becoming too loud when multiple notes are played, to which the answer is of course, ??? actually i want to know this
also our latency is unsatisfactory. i wonder why though; it might be buffers or something with sdl2.
hmm also the program makes a little bump noise when it starts, which doesn't make much sense but probably is worth fixing.
code here: https://github.com/lf-/synthtoy