I have a question about what levels to set the volume at with devices connected to the Apple TV. I often airplay things from my Mac to my Apple TV, and my TV has speakers connected to it. There are three devices with volume settings on them: Mac, TV, and speakers. How should I set the levels? Should the Mac and TV be at 100%, then adjust the speakers accordingly? What if I would like to have most control with my Mac? I'm looking for the settings with the best possible sound quality.