You need to use Internal Volume, otherwise MC will not know your reference volume. You will then need to set any Windows and receiver volumes to max.
I think I was a bit unclear: I *want* to continue to use the receiver's volume control. This way, I'm using the same controller for any audio device (since they all run through the receiver). And, if I set the receiver's volume control to maximum, I'd destroy my ears if I forgot to reset it before switching to another audio source!
So, since I will be using the receiver for volume control, does the 'loudness' feature provide any benefit for me? Or is it only affective when using MC's internal volume controller?
Second question: If I'm using the receiver's volume control, should I have MC's (and the system's) set to 100%. Or is there a more optimal level for those?