5.1 channels sound AWFUL when being ripped. Any fixes?

[EqualsPeach]

I picked up the 2009 Deluxe edition of Black Sabbath's Paranoid, which includes a DVD containing quadraphonic mixes of the album material. I'm currently trying to rip those songs in 5.1 channel format so I can share them with you, but the 5.1 mix ends up sounding AWFUL in comparison to the album mix. I've tried a number of different programs, all with a less than optimal result:

Acrok Video Converter (trial version): sounds too grainy
Aiseesoft Video Converter (trial version): sounds too grainy
VideoProc Converter (FULL version): sounds too grainy!
HandBrake: this one I've had the best sound quality with... BUT it stutters every second!

I've had my patience with this rip wane every hour or so. I desperately need your advice on how to get the optimal result. Thanks.

 

[wizfrikiman]

DVD Audio Extractor is the best. It allows you to losslessly rip the sound in its original format, or even convert it to any other format you wish.

 

[burntscarr]

If you can rip directly to an ISO then someone here could likely convert / rip the audio from that for you.