My signal path is all purple, but the system volume still affect the music playback volume. It’s not the case in macOS. Therefore Roon doesn’t seem to bypass the Windows OS mixer.
I did choose fixed volume on Roon in exlusive mode. But system volume control still affects volume. No matter what I do, Windows can change the output volume.
I use FiiO as a USB to Coax converter. I’ve compared direct USB connection with Coax conversion when onnecting to my gaming PC, the direct USB to Modi sound much harsher.
actually I’ve just tested with my other DACs. Using ASIO driver the volume can be changed with system volume. WASAPI volume is fixed. So is ASIO not bit-perfect?