[steelman1991]

I had this issue and got it fixed after a lot of frustration.

I had to manually make a custom resolution of 1080p@60hz in the catalyst drivers. Then change the sound to sync in xbmc to be off. Then exit xbmc, restart it and reset it to to sync to the video. Then go to the system info (I use transparency, not sure if all skins support this), and check if it now lists the system running at 1080p@60hz. If it does not, then you need to choose a different audio sync method in the xbmc settings, exit and go back in till it says 60hz. As soon as it says it's running at 60hz, the audio works perfectly.

Prior to doing this I had 24hz setup in the amd driver which it autodetected for my tv even though it can run at 60hz (probably because that is standard HD frequency), but it messes up the audio sync when this happens. Force it to 60hz and you should be good to go (assuming your TV can support 60hz)

You've put yourself through a lot of trouble - if your screen accepts 60Hz, then CCC will detect that and provide that refresh rate as an option, there is no need to make custom resolutions or force resolution rates or for that matter reset 'sync to video' (this is a standard xbmc setting). Both 50 and 60Hz work without issue (for me and I haven't seen any reported issues with them, only 24Hz), however these bring with it their own video playback problems (stuttering and pull-down issues).

Many like to view their files at the native refresh rate, but that is nigh on impossible without audio sync issues and setting delays.