I would like to cause an audio signal in channel A to be modulated in both amplitude and frequency (simultaneously) by a random waveform in channel B.
To take an example, ch.A is a 2Vpp 200Hz sine wave. Ch. B is brown noise that has been time stretched to produce a slow random wave form. When the latter is used to modulate 200Hz, the 200Hz would vary in amplitude between 1 and 2Vpp, and in frequency between 150 and 200Hz.
The depth of modulation for both amplitude and frequency ideally need to be specified, perhaps as a percentage.
Is it possible to create a script that will do this?
How would that work / what does that mean? What is the transform function? Can you give an example of that process performed in some other way (an electronic circuit, or steps that could be done manually with Audacity or some other application)?