Mr Trev
Headphoneus Supremus
Yeah but tried several different uploads. The files play ok on my laptop. So it seems like the X3's read/process speed arent adequate.
Since all of your x3s play them smooth, it must be the reading speed.
Couple of good ideas were brought up here that i want to try first..will give it a go after work.
Could be the files got corrupted during the transfer to the x3/sd card. Another thing I found that can work if that isn't the case is do a flac-flac conversion. Sometimes the file header can get messed up, or just give the x3 fits.