the reason is how adpcm works (many samples in one big stream) and how it is converted into a wav file.

https://wiki.neogeodev.org/index.php?title=ADPCM (read 'Drifting')

I have told you that this way is feasible but also a lot of work and the quality is not the best.



I did a little test with kof94, loaded all roms (6mb) and then tried to detect the samples automatically, this doesn't work perfectly (some samples aren't separated correctly yet) but there are more than enough samples found already... seems to be a lot of fun with manual ripping!