Anyone encounter an audio buzz on their Ipod Touch Gen 3? On tracks featuring vocalists such as Andrea Bocelli or Charlotte Church Pie jesu (1:30) I encounter a buzzing distortion. I load the same tracks onto my Iphone 3G and do not get the same problem, so I know there is nothing wrong with the recording. Had my Ipod swapped with a new one at Apple service, but problem still persists, only not as bad or often, only when the singer hits the high notes. Help, Is this a manufacturing defect as I spent quite a few hundred dollars on my 64 G Ipod? Sorry for being an audiophile. No overheating as it occurs from startup.