here’s something I hadn’t really paid attention to till today:
The triangle oscillator turns into a sawtooth at either “pulsewidth” extreme. Interestingly though, it’s inverted phase from the regular sawtooth wave. (you can nearly cancel out the waveforms entirely by dialing in levels right) This brings some interesting waveform design options.
Two square waves without using a square wave:
- oscillators 1 and 2 nearly equal, slightly detuned. One a sawtooth, one a triangle with max/min pulsewidth. Dial in the 1/2 levels right, and you get a PWMing square wave (subtracting a phase-shifted sawtooth from another sawtooth makes a square wave, and the detuning is effectively like a phase modulation)
- Osc 2 a triangle max/min pulsewidth one octave above a sawtooth Osc 1. Hard sync 1->2. Dial in the levels right, and you get a 50% square wave.
A more interesting waveform I discovered today: sawtooth Osc 1, triangle Osc 2 25% or so pulsewidth. Osc 1 around 80% level, Osc 2 around 100%. If you dial the levels right, you get a waveform that looks like a sawtooth with a blank shelf. Or like a square wave where half of it is entirely sloped (like an extreme version of the “transistor square” wave)
I love stumbling on these sorts of niche interactions.