This is a bit of a weird one and I'm going to do my best to explain it.

So I picked up my guitar again after a few weeks/months of not using it. Loaded up an easier song to get myself back into it, and I noticed the notes looked a bit laggy as they were coming down the chart and every now again it would jump a little bit, not loads but enough to put me off. I play on expert and the more notes the worse it is really.

No worries, I think, probably just needs calibrating, so I do and that doesn't help. I have 2 rockband 4 discs so I swap them over, doesn't help either. I've moved where the game is stored from external to internal storage but doesn't help either. The weird part is, if I load up the same song in training it runs perfectly smoothly, its almost like visually my xbox is struggling, but still runs call of duty etc. All fine, and theres no way the RB4 visuals are heavier than them.

Does anybody have any ideas about this? I'm going to uninstall it and reinstall as a last idea but can anyone think of anything that might cause this or what a fix could be?