yes, two inputs and one output. I think it would be best if it works
independant of bit depth. First normalize the input signals to -1...+1
range, then multiply them so that the result is also in the -1...+1
range, then normalize back to 16bit or 24bit range.
It will internally work with floating-point numbers only (32bits or
64bits).
Normalization is done with other filters.
Meanwhile you can use sox multiply effect.
Note that sox internally operates with 32bit integers.
You can find filter in master branch of FFmpeg repository.
Which other filter can I use to convert the input to -1..+1 interval,
and convert the output back to 16bit or 24bit interval? I saw that the
multiply filter in sox has these normalizations already included.
Thanks,
Michael
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