[SonOfLilit]

I'm also working on a gameboy inspired music app! (for Android, in Rust)

If you use a perfect square wave, the aliasing is extremely audible and sounds terrible.

As far as I can tell, in native everyone uses a nifty algorithm called bank-limited audio synthesis, and specifically blargg's implementation blip_buf.

https://slack.net/~ant/bl-synth/

If I were OP I'd try to compile the rust port of this library to WASM.

[iamdan]

That's sweet! I'm trying to see how far I can push the web audio api but yeah the aliasing can be harsh. I think there are also some things I can do with filter nodes to smooth things out a bit

[meindnoch]

The aliased harmonics are folded back and mixed with the true harmonic content of the square wave. You can't filter them out without significantly affecting the square wave sounds.

[SonOfLilit]

You can work in a much higher sample rate and then downsample