sound garble when changing keys

[bendrew]

Anybody had problems with sound garbling when changing keys. I we only noticed this problem lately when we did recording. Whatever keys changed, sound garble and sound not clear. Main computer and player computer has the same problem. I'm using V5.30. Hope somebody can help me with this one. I did all the tips that I can get from this forum regarding sound problem but no solution at all. I'm might be downgrading to old version if no remedy for this..