adjust volume for iTunes with master F9/F10/F11 volume keys with Apple TV
When I am using my MBA speakers or headphone out to play iTunes I can control the volume with the master volume keys (F9, F10, F11). However, when I toggle iTunes to send the music to my Apple TV (which has an output to my stereo receiver) the master volume keys don't adjust the volume. I have to physically go into iTunes and reduce the volume on the slider bar.
Is there a way to have the master volume keys adjust the volume of the output to Apple TV (or iTunes)?
MB Air 2010, Mac OS X (10.6.5), 2.13GHz/4GB/256GB SSD