The sound canon is a type of augmentation canon in which the followers are derived from stretching of sound waves.
This essay contains a description of the method and some historical context.

Although mainly used in an audiovisual context, this piece is also organised as a sound canon:

Electronic Movement (Sound Canon)

In this three-panel video each panel plays the same footage but at a different speed:

Total Commitment, 2019, 4'12", premiere at the Edinburgh International Film Festival.

total commitment, Lars Koens

3:2, 2016, 3'15", animation and sound

5:4, 2015, 3'34", animation and sound