user4711 wrote:The important thing is that buffer size must be 256 or 512 or 1024.
WDM Default in VM is 512... so leaving at that...
user4711 wrote:And you need in windows sound prefs enable exclusive mode and both option in the exclusive area need enable in realtek spdif output. maybe you need reboot, because another program that use sound forbid that WDM switch to exclusive mode.
A bit clearer here please, do you mean ALL your output devices to be configured as exclusive (only), or just A1 (as VM bases of A1), or just the virtual VM input that you set as default sound etc.?? I have 5 output devices, only 1 of them is SPDIF\Optical out (my amp \ gaming headset), rest of the A2-A5 outputs are either analog or USB.
In VM system settings\options
All outputs are showing as correctly open, up to 8 channels, 48khz and except for the RIFT and USB interfaces, are driven by Realtek drivers.