No worries smile

Generally the HD621 works well with Roon / PC.

For the first time I recommend booting the pc with the HD621 attached and on the input assigned to PC.

On PC, it should appear in the PC display and Audio settings. I set the HD621 to 5.1 in the PC audio settings and in the sound control panel in the properties for HD621 on the advanced tab. I set Exclusive mode enabled for both options.

In Roon the HD621 should be the second HD audio driver for Display Audio.

You will probably find that when you PC has a Graphics update you will have to reassigned the HD621 in Roon as endpoint.


Main system:G65, 218, HD621 2 x DSP5200SE, 1 x DSP5200HCSE, 2 x DSP5200SL, Power Sound Audio S1512, DSP Anti-Mode 2.0 Dual core, NuPrime H16AES, 518, Dune HD Homatics Box R 4K Plus running CoreElec 21.3, Oppo 103D and SqueezeTouch. Atmos, MQA and Trifield! smile