I would like to take an arbitrary audio file (such as an
mp3) and edit it so that the sound "moves" from one speaker to the other every fixed number of seconds.
I would like to simulate someone turning the above knob all the way to the left and then all the way to the right (and back again) every, say 3 seconds.
How could I do this, what tools should I use, or where should I look to learn how to do this?
I am using Linux, Ubuntu 12.04 64-bit specifically.