I’m not entirely sure how I would do that manually, much less automated.
Import or Open the show. Using the drop-down on the left, Split Stereo Track.
Select the top track and drag-select 1/2 second. Silence it with Control-L. Select the next 1/2 second on the bottom track and silence that with Control-L. Select the third segment on the top track and silence it. Repeat forever.
You can do it with this Nyquist script in the “Nyquist Prompt” effect (Effect menu).
(setq frequency 0.5)
(setq bias 0.0) ; must be between -1 and +1. 0 for square.
(if (arrayp s)
(let ((lfo (osc-pulse frequency bias)))
(mult (aref s 1)(sum 0.5 (mult 0.5 lfo)))
(mult (aref s 1)(sum 0.5 (mult -0.5 lfo)))))
"Error. Stereo track required.")
Copy and paste that code into the Nyquist Prompt effect and apply to a stereo track.
Thank you Trebor, I’ve corrected the code in order to be on the safe side.
Normally, the two channels should each have a gain of -6 dB and the doubling - if the other channel is silenced - shouldn’t be a problem.
There are different strategies for proper panning thinkable.
A dual mono sound should be panned from 0 dB (all left) to -6 dB (all in the middle, overall energy still 0 dB) to 0 dB (all right).
If different sounds are allocated to the two channels, -3 dB will be the chosen value for center panning.
Furthermore, the distribution should actually be different for head phones or speakers. The latter should regard the angle between listener and speaker 1 and 2. This is normally 60 degrees.
Another interesting fact is that the extreme panned sound is equally located at the farther left or right if the gain difference is about 18 dB.
Our snippets silence the opposite channel totally whereas a scale factor of 0.1 would be enough (and probably better for the speakers). Many head phones show a comparable “leakage”.