Is it possible to modulate a tone with messages?

Special Interest Groups Audio Processing
1

Is it possible to modulate a tone with messages?

How can I do it?

2

Is your question related to “audiobook production”?

If your “message” is an Audacity track, you can modulate it with a tone using the following code in the “Nyquist Prompt” (see: https://manual.audacityteam.org/man/nyquist_prompt.html)

Modify the first line as necessary according to the required modulation frequency:

(setf mod-frequency 10.0)
(mult *track* 0.5 (sum 1 (hzosc mod-frequency)))
3

Thanks