What does a earphone splitter do?
IPod earphone splitter?
they are used so other people can't hear what you are listening to, only you can
How come the left earphone doessn't sound as loud as the right earphone?
right--main music/beat left--base chorus. For iphone/pod/touch, you can change this in a setting called the equalizer
What does headphone splitter do?
Allows you to have 2 or more headphone ports in the same device
What if your earphone is not connected to your mobile but still it is displaying that earphone is connected?
They were receiving instructions and timings. Also, because sound travels much slower than light, each performer would have had the music directly in their earphones to ensure they all stayed in time.