wipEout 'Reverb echo' missing

Hello everybody and sorry for my poor english.

I've been reading us since last winter and I think it's time for my first post.

I own the game wipEout and use an image in order to play it in ePSXe 1.60 with Mooby 2.8 virtual cdr plugin. Everything it's ok, but I realized about a missing sound effect using the emulator.

This is the 'reverb echo' both in audio CD-DA and sound effects. If you've played the game in PlayStation you know that when you are driving the craft in a elevated circuit zone the song you are listening and the sound effects turns into a 'reverb echo'. That's very impressive and it's create a very good height atmosphere.

Well, part of this is missing in ePSXe. The sound effect turns ok into the reverb but the CD-DA song not. Anybody knows why? Maybe for playing it from an image?

I must say that I cannot play the cd-rom directly because in my new system there isn't a digital cable audio from cd-rom to audio card, and we know this is imperative in order to hear cd-da via CD-ROM in ePSXe.

Greetings and thanks in advance.