Converting to PSP format = poor audio quality

Thank you for a great converter. I only have one major problem.

When using DVDFab to transfer movies to PSP you can't get more than 64 kbps sound quality. This is as high as you can get in the options menu.

I also tried adjusting the volume during conversion. But no matter what the sound quality sucks. The sound quality in PSP Video 9 is much better. In my opinion this actually makes DVDFab useless for PSP-conversion. Too bad because DVDFab is otherwise an excellent converter and the sound quality on the PSP is top notch when you use headphones.

Is it possible to fix this and allow encoding in 128 and 192 kbps?

Klemme