i just got the ad9 reissue, and i absolutely love it. sorta. ive noticed two problems with it-
1. at longer delays it makes a faint high pitched scratchy sound
2. although the manual claims it has self oscillation and infinite repeats, my unit fades out after about 18 or so repeats and does not self oscillate.

does anyone know the cause of the weird noise or experienced it too?
and does anyone know why it doesnt do the self oscillation? should i return it?? thanks