My JVC DVD player & Sony receiver are connected by a digital audio coaxial cable.
I get 5.1 (5 discreet channels) audio through 5 amplifier channels to 5 speakers in my living room.
This works for DVD video discs (2-channel, 5-channel, or DTS audio).
It also works with DTS audio discs (5-channel remixed/remastered).
It also, also works with some DVD-Aodio discs (ones that contain not only 192khz 2-channel or 192khz 5-channel DVD-Audio, but also contain 5-channel DTS audio).
Problem is, some of my favorite DVD-Audio discs contain ONLY DVD-Audio.
If I play one of these in my DVD-Audio player, my new receiver's display flashes "UNLOCK", which, according to my receiver's manual, means it detects no digital audio signal.
True DVD-Audio @ 192 khz is not supported by existing digital audio connections on consumer electronics, be they coaxial or optical. This is done to thwart direct digital piracy. Also, these discs use a much-more powerful encryption scheme that your typical dvd decrypter program cannot touch.

Either you go with analogue 5-channel outs, where your dvd player does the converting, & pipe that out to matching analogue 5-channel ins on your receiver (like my old Sony receiver had), or you get a dvd player-receiver combo with HDMI (vers. 1.1 or 1.2) ins & outs that can transfer the DVD-Audio. HDMI uses built-in encryption that allows transfer of DVD-Audio, but does not allow copying of the streaming signal in a digital format.