Error '!dat' trying to set the (null) audio devices' sample rate

Question

I am trying to play an audio clip (using AVAudioPlayer) and a video clip (using MPMoviePlayerController), both of which were working.

I then checked the files into S

Answer 1

had the same problem for several days (extremely annoying). I managed to fix it by changing the input settings for audio under system preferences.

System Preferences -> Sound -> Input