Even after being on for hours, and running the tuning process, I'm still getting tuning variation, as much as ~15 cents in some cases, in different octaves of my Prophet 10. Like C4 will be +0, C5 +4, C6 -14. It's not consistent across notes and octaves, but in general the higher octaves are more out than the lower ones.
Rev 3 is on, and Vintage is at 4. Not running Round Robin.
Is this within expected limits or is this evidence of a problem that can be solved? I'm playing a lot of music where pure tuning is very important, I would love to keep using this instrument if I can tighten it up. Thanks!