I was thinking most of mine were at 24-bit/96kHz, but now that I'm looking at them, several of them just say "Advanced Resolution" with no specs. Right now I don't have a way to play them, either. I gave away my Oppo since I thought I'd upgrade at some point to the one that can send SACDs in DSD. For some reason I was thinking 24-bit/192kHz were usually 2-channel recordings, though I don't own any 2-channel DVD-Audio discs.

So in my experience, they're all 5.1. Ha ha.