Simon, if the Disc is a SACD or DVD Audio multichannel, you could probably rip it into 5.1/7.1 PCM or DSF format and stream it via HDMI into your 861v8 with Roon and an endpoint like a Vero 4k+.
I have about 59 albums ripped and tagged with multichannel audio.


Primary: 818v3+ID41, M6 stereo pair, M SpeakerLink cabling, Sonos+96kHz Cullen, silver DSW
HT: Marantz prepro, 271, DSP3300, 8K SE FL/FR pair, DSP M6x2, DSP320x4 (ceiling), black DSW, 520 RL/RR rear in-walls
Living Room: G65, 640 L/R in-walls, UHD722, MS600
Vac. Home: G61, HD621, 4xDSP3100, DSP3100HC
MDMS:NUC/ROCK+TrueNAS Core 12.0 ZFS file server