Before I try that, I'd like to say that ssb Infinite sound works Post Merge: July 10, 2016, 09:58:39 AMI fixed it. I had to make it not HD tho. Post Merge: July 10, 2016, 10:11:56 AMAnd now it's not
Try the latest development version of Dolphin. Also, does an unedited version of Project M sound fine on Dolphin? If it does, one of your edits is likely the source of the problem.
Maybe one of songs i recently installed is the source, although they worked a bit before