How can I recover my music - exclamation marks
All my music (except some more recent iTunes downloads) now has exclamation marks and double-clicking gets a cannot locate file response. The info function tells me the files are located in: files://localhost/Users/myusername/.Trash/iTunes/iTunes Media/Music/name of album. The files are not in Trash. Not sure when change occurred - I recently upgraded to Mavericks and I also recently emptied my trash but I'm fairly certain iTunes has been operating fine since both events.
Help please!
iMac, OS X Mavericks (10.9.1)