Most (read "all") DVD-Audio have DVD-Video tracks that are DD and/or DTS. These are regular 16-bits 48hz tracks. A DVD-Audio player would be able to decode the 96/24 tracks, but then it would need to be connected either via a 6/8 channel analog output out through HDMI 1.1 or higher.

In your present case, you are getting regular DD or DTS (which are often quite good in their own way).

See Mojo's signature