Originally Posted by alandail
your tv volume is at 5, how are you going to turn the sound up to 7 with the line level?
is a standard level for consumer audio equipment, typically −10 dBV (0.316 VRMS
). Since it has a common level, it makes connecting various audio components easier.
Likewise, the signal level of the digital audio in HDMI is a standard level from whatever HDMI source device (DVD, Blu-Ray, DVR, Cablebox, Roku, AppleTV, etc.) you happen to be using.
Neither of those are where you'd want to "turn the sound up to 7".
If any case could be made, it might be for a mute button on the Apple remote. But typically what happens is that someone mutes the audio, forgets about it, turns the volume on their TV/receiver/etc. up full, then figures out that the mute is on, then blows out their speakers when they get instant full volume (or their eardrums if they are using headphones).
No, the TV or receiver (or whatever audio amplifier you are using) is the right place for a volume control. If you have a halfway modern receiver with HDMI switching, it came with an IR remote that will "learn" commands for driving other A/V components. My Cox DVR remote has a volume control that automatically turns the TV or 5.1 receiver volume up or down
regardless of what other component is selected on the remote, I think that's pretty standard for any recent multi-function A/V remote.