I unearthed my DTS-DVD-Audio discs, sorta irked me all over again how some of these were marked and marketed, very misleading.
Of the 3 discs below, only one has rip-able stereo tracks (the Frank Zappa Halloween disc), and even there, the 24/96 labeling is only "Advanced Surround DTS". The stereo tracks I ripped are 24-bit 48kHz PCM.
The other two, those were my fault while on some drunken sailor disc buying binge at the now defunct Circuit City. They are marked as DTS-only but I failed to take heed and thus they were and are to this day useless to me. Because it was really my fault, I didn't return them.
On the Zappa disc you can see why only the 24/48 was rip-able, the compatibility chart (which conveniently only appears on the inside booklet so you wouldn't know this until opening the packaging) clearly states that DVD-ROM drive compatibility (read: Computer) is not available for the Advanced Surround content. Those other two DTS-only discs are thus not rip-able, the computer's DVD-ROM drive won't recognize them, only a DTS capable DVD player will, and there is no stereo PCM content on them at all.
Is your Bonnie Raitt disc actually a DVD-Audio, or is it some weird DTS disc like the above?