My Pioneer 578 DVD player says "CD" when I put in my Eagles's HFO. The case doesn't say DVD anywhere on it. Both the DVD player and my Onkyo switch to DTS when I hit play, and the info screen on the DVD player indicates that it's a CD.

The reason I point this all out is that my Floyd DSOM clearly comes up as "SACD" and my Metallica Black clearly indicates DVD-A, with a DTS alternative track.

So what is this DTS-CD format that HFO is using?

Also, why do I still get 5.1 surround when playing the DTS tracks, but have the Onkyo set to MultiChannel inputs?