I think I might have come across a post on this but can't seem to find it. The sound from the built in speakers plays well. When I use the headphone jack, the sound of the music is split into the background tracks and the vocal tracks. The vocal tracks are very muffled and the recording just isn't well played thru headphones. Almost like turning off the vocals on a karaoke machine. Do I have a broken headphone jack or are they all like this? I would like to play thru larger speakers. But will return for a new one if it's only my unit and not a flaw in the design of the sound system. I think I saw that bluetooth headphones are OK in the post that I can't seem to find. I don't know if this is related, but when I make a recording on evernote and play it back thru the native music player and the built in speakers, It starts to make these very loud clicks when the recording is done. The only way to stop it is to power off. Again, I don't know if this is on all units or just mine. Skype test call is fine and phone sound is OK. Any thoughts or confirmation that this is consistent with the hardware?