Basically what your saying is that this game won't load without unless you decrypt the eboot? That's right, decrypt the eboot and it should work but you need a psp to do that and something called PRXDecrypter ( google it for more info). What was the exact error specifically? Btw, the audio in, most cases ,shouldn't prevent the game from loading at all. You might have confused decoding the audio and decrypting the eboot mixed up.
Funny thing, I spend more time on the forum instead of on emulators 