Pressing cmd+alt+M on iTunes?

[iiiGerardoiii]

when i was trying to minimize the window of iTunes, i accidently pressed "alt" with "cmd" and "M" and this headphones volume appeared!

http://img801.imageshack.us/img801/7220/capturadepantalla201011b.png

can u guys tell me what does that mean? is there any difference about the volume and this headphone volume?

maybe the question is stupid, i'm sorry i'm new on macs 🙁
help would be great 😀

 

[iiiGerardoiii]

thanks for your support..

 

[Blondie :)]

Dude, I have absolutely no idea haha. I tried to get the same thing to happen on my mac using that key command, but it wouldn't work. I think you might have actually pressed something else. However, I don't think that the volume's should differ or anything. As long as you can hear it and it's comfortable, I wouldn't worry about it too much.

 

[iiiGerardoiii]

yea it doesn't happen anymore :/ at least in Lion