I'm really curious to see if I'm crazy or have some kind of major problem here. Whether you are an experienced old timer or a noob, can you try this quick and easy test and let me know what you hear?
And please don't read what others report until you try it for yourself, as I don't want anyone's responses to be influenced by what others are reporting.
1. Load a piece of music and turn it up loud. Don't pick something too mellow. Can you still hear me? Then turn it up a bit louder.
2. Reduce the volume by exactly 60dB (you can double click on the number below the fader and type "-60").
Report what you hear, be honest:
Is it still (too) loud?
A reasonable level for background music?
Quieter than that?
3. Now reduce the gain an additional 20dB so you're at -80dB. Sonar won't let you go that far on the fader (it jumps from -75dB or something like that to -infinity), so you'll need to use Input Gain or a (flat) EQ's level control or the HW faders or something to get the additional -20dB.
What do you hear now? Be honest.
Thanks!