Muller-Hysteresis-V/electronics

Hysteresis by Jeremy Muller was inspired by James Tenney's alluring Critical Band. Hysteresis starts off with a similar idea. Using a sine wave detuned a few hertz – less than about 20 Hz difference – from the vibraphone pitch creates a rhythmic beating. Slowly changing the pitch of this sine wave by 8 Hz or so makes the rhythmic beating either slow down or speed up (depending on if the detuning is getting sharper or flatter). This beating sound comes from the sound waves canceling each other out at certain times while other times reinforcing each other.

Number of players: 1
Difficulty: Advanced

Instrumentation: Vibraphone, computer-generated sine wave