Unable to start audio playback. Please confirm your audio device is properly configured or change the driver selection in Preferences: Audio Hardware.
On After effects CC
Im on a mac with mavricks OS and i have done what it says and changed it but it go's back to the setting that it was on the one that does not work.
We need a lot more information about your system. Audio preferences, audio devices, what model of the computer you are using. An off-the-shelf iMac Mac Mini or MacBook Pro should work just fine.