Gran Turismo - USA - UCUS98632

[gid15]

Code:

hleIoOpen filename = disc0:/PSP_GAME/USRDIR/GT.VOL flags = 1 permissions = 00
sceIoLseek - id 4 offset 938701888 (hex=0x37f37440) whence PSP_SEEK_SET
hleIoRead(id=4,data=0x9ca50f0,size=0x800) async=false
hleIoRead:
0x09CA50F0 81 29 B0 29 C1 FD AD 78 78 74 05 40 53 93 54 5C  >.).)...xxt.@S.T\<
sceMpegQueryStreamOffset(mpeg=0x9ca6380, buffer=0x9ca50f0, offset=0x9ca5060)
Stream offset: 2048, Stream size: 0x21E3000
09ca50f0 : 50 53 4d 46 30 30 31 35 00 00 08 00 02 1e 30 00 P S M F 0 0 1 5 . . . . . . 0 .

This game seems to use an encoded file GT.VOL: after reading the data from the file, the data is decoded internally by the game before passing it to sceMpeg.
In such cases, the audio cannot be automatically extracted by Jpcsp