The function you write will be called highpass$\_$filter$($num$\_$samples$\_$to$\_$average, audio$),$ being audio a tuple. The output is

created by averaging nearby samples, but with every alternative sample reversed in sign. This is

illustrated with the following sample usage example:

$>>>$ audio $=(1,3,6,8,4,2,-1,-4,-7,-11,-8,-5)$

$>>>$ highpass$\_$output $=$ highpass$\_$filter$(5,$ audio$)$ # i$.$e$.$ create an output by forming

$,->(1-3+6-8+4)/5,$ then $(3-6+8-4+2)/5,$ etc.

$>>>$ highpass$\_$output

$(0\mathrm{.}0,0\mathrm{.}6,-0\mathrm{.}2,0\mathrm{.}6,-0\mathrm{.}4,-1\mathrm{.}0,-0\mathrm{.}2,-1\mathrm{.}0)$