Permutation synthesis is a technique for synthesis/processing of audio signals based on time permutation patterns.

sr 44100-sine 220.5- fperm 882/8820
sr 44100-sine 220.5- fperm 882/8820Hz
Waveform and spectrum of a 220.5 Hz sinusoid permuted with fp = 715 Hz.

More info in: G. Valenti, A. Valle, A. Servetti, Permutation synthesis, XX CIM-Colloquio di Informatica Musicale, Rome, 2014, here.

Here some audio examples of Permutation synthesis:

“Note”-based, simple examples: