Generating ASEs (FILE may be any sound or video file understandable by ffmpeg, eventually we use audio only):
aselnb FILE…

Then we can compare various ~/.ease/cache/*.ease files and get a positive result and time shift between them or negative one:
./aselnbcmp -v -c "$name1" "$name2"
./aselnbcmp -v -c -P 16 -S 8 "$name1" "$name2"

… or search one in another:
./aselnbcmp -v -s ~/.ease/cache/needle.ease ~/.ease/cache/haystack.ease

.