We make __ oscillators from only odd-numbered harmonics, and __ from all harmonics.
- Square, rectangle, and sawtooth; Triangle
Triangle is a gentle simple wave.
- Triangle, square, and rectangle; Sawtooth
- Triangle and sawtooth; Square and rectangle
Square waves only use odd-numbered harmonics.
- Triangle and square; Sawtooth and rectangle
Rectangle waves, while have a duty cycle, do not use all harmonics.