OK , I've just had a play around with my Imtoo DVD audio ripping software which I own (Old version 1.0), I have the DVD-A version of DSOTM, that has 4.1 and DTS sound tracks. The Imtoo ripper will NOT let me rip DTS but will let me rip the 4.1 track, DTS is not normally a default format as not all DVD players can use it. I have ripped many dvd's for audio with good results, I can recommend this software and the newer versions will probably do DTS. You CANNOT rip SACD with it though, as these are a completely different ball game.
Hope this helps a little.