SQ4

Made using WASM4, it's an early prototype.

Use the arrow keys to navigate, x and z to click.

Channels 1&2 use a pulse wave. Channel 3 is a triangle wave and channel 4 is noise.

The underlying platform's envelope generator is a little weird so the ADSR parameters behave different than normal (volume doesn't work as expected). I will attempt to fix this soon so there is more musical control of the steps.