gmfmod_decrypt
Simple program for decrypting soundfiles protected with GMFMOD's built in protection.
icuurd12b12's GMFMOD (FMODEx for GameMaker) has the function FMODEncryptFile for protecting files with a SHA1 hash as a xor key.
Unfortunately the design is a bit stupid, because the password hash is appended at EOF followed by FMODSIMPLEPW, however you need the hash of the password in reverse as well so you do need to crack it.
Usage
$ gmfmod_decrypt sound.wav
Password: very_secure_password
$ gmfmod_decrypt very_secure_password sound.wav
$ gmfmod_decrypt very_secure_password sound1.wav sound2.wav sound3.wav ...
$ gmfmod_decrypt very_secure_password *.wav
All of these would create sound1-decrypted.wav, etc.