Got the dock yesterday and will use on nightstand as alarm, radio, media delivery. Plugged in audio out to headphones and noticed that volume was up pretty high. Tried to adjust with volume rocker on N7, master volume, media volume, etc but no success while docked. I think I tried all the volume settings. Anyone know if you need an external volume control to adjust volume when docked or am I missing something? I guess some headphones with volume slider is not that big a deal, but unexpected issue.