I'm sorry to disappoint you, but I'm using the original PAL cd of the game..
btw thanks for your explanation about iso files and the .ccd/.img/.sub ecc... files
However with other games (FF9, FF8, FF7, Rollcage, Crash Bandicoot 2...) I hear perfectly the sounds (in Wip3out no, but that's a known issue)
When I open the emulator I can hear the bios sounds, and the other sounds..
In the game the situation is:
Menus: all sounds except background music
Movies: all sounds (Probably because the audio is integrated in the video)
Gameplay: all sounds except background music
I really don't know what to think