But the Toslink socket can send 24/192 stereo PCM streams to an AVR. The HDMI connection also supports 24/192 audio up to 8 channels. So, there should be two options to send either stereo or multichannel audio with 24bit 192kHz to an AVR…
Audiophiles might now ask about jitter and whether there are seperate oscillators for multiples of 44.1kHz and 48kHz via S/PDIF. That would suprise me, if it was present, but the basic transport of audiophile audio streams should be possible.