Add some fancy oscillators #270
Description
Right now we've got the basic oscillators (sawtooth, sine, square, triangle), but it would be cool to have some fancier oscillators as well. Here's some ideas:
- Polygonal Oscillator (original and anti-aliased)
- Phase Distortion Oscillator (maybe this)
- Square Wave with variable duty cycle
When we add more oscillators, it would probably also make sense to move the sound sources to their own module.