Hi, when i Put my headset on my ipad, i have trouble with sound. For example, on ipod, enstrumental sounds are good but the singer voice makes eco. Also on oplayer hd app, when i watch .avi films with subtitle, human voices not coming but other voices are good. How can i fix this?

(i'm sorry because of my english is not good)

Don't know if this will help.

Go to Settings >> iPod; and turn both Sound Check and EQ off.

Also, be sure to try another pair of earphones and make sure they aren't the issue.

I had the same problem. Just a full power off and on again seemed to fix the issue.