Topic: Roon volume vs Auto Ref level
Hi, I just purchased my RME ADI 2 Pro FS BE and started using it in my system with Roon endpoint on Pi4 feeding USB input. After playing with Auto Ref level feature I realized that I cannot take advantage of it because my power amp is a bit overpowered for my small room and max listenable RME volume for me is -22 db which is within +4 Ref level. But I can easily lower input volume level as I'm using Roon volume leveling. With -23LUFS volume level for Roon I can set -16db volume level for RME which uses +13 Ref level. In theory this should not introduce any additional noise as Roon uses 64 bit float processing for volume and converts to 32 bit for dac input.
So my question is what is better for ADI-2 Pro performance - lower digital signal level with +13 ref level or higher signal level with +4 Ref level? I see that +4 Ref level has slightly lower SNR in specs.