Hi, I Have used the lp16 twice now to play wavs and midi at gigs replacing an old zoom multi track. The first time went great without a hitch but at the last gig towards the end of the night something strange happened the tracks played back at a lower pitch for about 20-30 seconds it happened on two separate tracks. Has anyone else experienced this or similar I wondered if somehow the sample rate was fluctuating or maybe the usb stick had issues. Thanks in advance. Pete.