static get CHANNEL_NUMBERS() {
    return [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
  }
A simple array of the 16 valid MIDI channel numbers (`1` to `16`):

@type {number[]}
@readonly
@since 3.1
@static