Question about DSP volume and bit perfect playback

Thank you but DSP sound was bloqued in this configuration.
So I bought an USB DAC. Cheap but really good.

About the bit perfect , if I use the DSP sound, I loose it??? So how to configure to have bit perfect? You confirm that DSP sound is what I access when clicking on the speaker drawn down on the right of Roon application?
Sorry I am a beginner.