I understand that when you use software to control the volume, you will not get bit perfect output, since the stream is being digitally processed to achieve this. But if you set the volume level to 100%, does this not tell the volume control routine to make no changes? This would mean you can "switch on" bit perfect output, for those times when it matters, just by putting the volume level to max?
Sometimes I want volume control from my UPnP control point, when the sound quality isn't critical, and sometimes I just want to listen to the best, and it is a bit clunky to have to load up the Rune Audio web page, go into the settings and change the volume control method to achieve this.