OscillatorType

OscillatorType is a string that specifies shape of an oscillator wave

type OscillatorType =
  | 'sine'
  | 'square'
  | 'sawtooth'
  | 'triangle'
  | 'custom';

Below you can see possible names with shapes corresponding to them.

custom

This value can't be set explicitly, but it allows user to set any shape. See setPeriodicWave for reference.