I've found that song Pack doesn't work for the new cache.psarc. it corrupts the file and crashes the game. I've verified filed integrity and pulled down again from steam, but each time I run it the same thing happens.
It's damaging something to do with the new feature to use a mic instead of the cable. you can instantly tell as soon as you get into the game the icon of which path you are using is incorrect, it's missing the sub-icon for cable/mic. and if you hit CTRL to change paths the game instantly crashes.
Let me know if you need anything to help troublshoot or logs... CFSM doesn't report any errors when run on the cache.psarc.