Since the update of iOS 7 there has been some changes with recording applications.
I have an app that used to work with iOS 5 and 6, but when I tried to run it on iOS 7 - r
Add Privacy - Microphone Usage Description in your info plist to give access for the app to ask for permissions. This was causing me Thread13: signal SIGABRT error.
After this is done the error is solved automatically.