Description:
In order to implement audio into
programs and system services, the audio system in OS X offers various features
like audio processing, MIDI, input and output, etc. You can interact with audio
system through System Preferences, Apple’s Audio MIDI Setup utility, etc. But,
problems may occur in it like no sound, scratchy audio, etc.
Solution:
If this problem occurs, check that
the problem is in program or it is systemwide. Try to use some other program to
record or play back some audio. If it is working properly, try to change some
settings of the problematic program. If it doesn’t work then quit the program
and re-launch it again.
The next step is to reinitialize
the system’s core audio daemon process. Also, you can try changing some audio
format and audio/output device settings in the Sound panel of System
preferences. Further, you can use Audio MIDI Setup utility available in
“Applications > Utilities folder.”
If still it is not working then
reset the audio daemon by restarting your system. But, if you are working on
your computer then it is not recommended to restart it abruptly. In that case,
reset the audio daemon manually. For this, open the Terminal Utility and run
the following command:
sudo killall coreaudiod
Moreover, you can use graphical
interface tool for this. Launch “Activity Monitor” and select “All Processes”
from the View menu. Then search for “coreaudiod” in the process list. By
selecting it, click the “Quit” button in the Activity Monitor menu bar.
With these actions, you can quit
the “coreaudiod” process but it can be launched again as it is loaded by Launch
Daemon script.
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