DVDSP2 audio problem
 

I've made about 4 dvd's on DVDSP2 that video quality wise have come out great (through quicktime conversion and compressor both off of fcp4) But the one common problem i have is that the audio comes out like crap, for both the sounds of the video and the music.
I capture at the default audio on stereo and the music is from iTunes, aiff or aac @160kbs.
I tried exporting the audio separately from FCP4 and still i get the same bad quality(sounds like blown speakers)
Any suggestions?

Do i need to use a AC-3 encoder? And if so, which one?
I'm not sure if it's the encoding or a setting in DVDSP2 that's causing the problem.
Any suggestions greatly appreciated.

Use the Apple A.Pack that comes bundled with DVDSP. That should fix your audio issues.

So is Apack a good enough or great ac-3 encoder, or is there any better ones?