Over the past few days I've been improving oscillator and filter quality. Yesterday I improved the pulse waves by doing the correct form of additive synthesis on the rectangular function(instead of taking a square wave and awkwardly rescaling it). After I did that I looked into improving the tonal noise, which has always had inherent aliasing, being an oscillator based on a small single-cycle noise pattern. I decided, based on my success with oversampling elsewhere, to oversample the tiny initial waveform 4x, making aliasing much less present until you hit C-6 or so. In the process I discovered that I had made the wrong constants for the Blackman-Harris window that I'm using to oversample things, so the filter is a little cleaner now too. I also shrank the tonoise waveform to 32 samples instead of 64. The downside of doing this is that it's more "tone" and less "noise," the upside is that it performs better and it's more straightforward to modulate.

Today I made just about the simplest patch you can make with the tonoise oscillator: envelope the noise in and out. This gives you an approximation of Karplus-Strong style pluck sounds, only more metallic sounding.