Hmmph.. I have a EVO 7 . But i have some problems .. It gives a bzzzzz sound. Without playing any music or even when playing music (less noticable). Why? my evo got prob ? or all Evo 7 also have the same prob? i think it is the mic input prob. because if i turn the knob to increase the volume of mic. The bZZzzz sound will increase. HELP .