fix some comments
turn some simple functions into properties
rename members
disentangle output formatting
phrase output in terms of change from a to b without naming them
label segments with no differences
rename arguments
sort equally good matches by absolute, not signed, offset
call simpler method
detect loss of high frequencies
show only a single match with -M
more specific error message
use exceptions to handle -s
combine channels in lower bound calculation since they are correlated anyway
performance tuning
avoid using xrange as sequence type
simpler logic parsing ffprobe output
simpler logic memoizing audio data
tweak import order
tweak numpy calls