This is cool, a nice beginner or general convenience feature might be the ability to highlight some basic scales like major/minor. This would probably get people off the ground writing music that sounds good much quicker.
It could be because Firefox reduced time precision to fend off fingerprinting and timing attacks. To turn it on, you’d need to set the Cross-Origin-Opener-Policy to “same-origin” and the Cross-Origin-Embedder-Policy to “require-corp”.
Reference — https://developer.mozilla.org/en-US/docs/Web/API/Performance...
The latency is horrendous, I use a real-time kernel to make music @3ms< you're never going to get that with a fully streaming application however, you could possibly send bigger chunks of data which interact on the client-side. It's still problematic, but bravo! Valiant effort.