The audioop module contains some useful operations on sound fragments. This is the same format as used by the al and sunaudiodev modules.
All scalar items are integers, unless specified otherwise.
Return a fragment which is the addition of the two samples passed as parameters. Both fragments should have the same length. Return the average over all samples in the fragment. Return the average peak-peak value over all samples in the fragment. No filtering is done, so the usefulness of this routine is questionable.