Wave_read.setpos(pos) Set the file pointer to the specified position.

audioop.avgpp(fragment, width) Return the average peak-peak value over all samples in the fragment. No filtering is done, so

audioop.lin2lin(fragment, width, newwidth) Convert samples between 1-, 2-, 3- and 4-byte formats.

Wave_write.setnchannels(n) Set the number of channels.

oss_audio_device.setfmt(format) Try to set the current audio format to format—see getfmts() for a list

sndhdr.what(filename) Determines the type of sound data stored in the file filename using whathdr(). If

audioop.findfactor(fragment, reference) Return a factor F such that rms(add(fragment, mul(reference, -F)))

Wave_read.rewind() Rewind the file pointer to the beginning of the audio stream.

colorsys.rgb_to_yiq(r, g, b) Convert the color from RGB coordinates to YIQ coordinates.

oss_mixer_device.set(control, (left, right)) Sets the volume for a given mixer control to (left,right). left