A ring-modulating instrument.
This CLM instrument will apply ring modulation to a sound file with a specified sinewave.
Ring modulation is a fancy name for multiplying the two signals together.
When you multiply the two sounds together in the time domain, you get the sum and difference tones in the frequency domain.
(with-sound () (ring-modulate-file-synth nil 300.0 0.5 "granis") (ring-modulate-file-synth nil 100.0 0.5 "granis"))
Edited by opmo