Fixing Crackling Sound Issue with AlsaMixer

To fix the crackling sound issue with muting and unmuting the sound, you can follow these steps:

1. Open the terminal and enter the command alsamixer to launch the AlsaMixer interface.
2. Use the F6 key to select the default sound card.
3. Use the arrow keys to navigate to the S/PDIF option.
4. Press the 'M' key to mute the S/PDIF option.
5. Press the 'M' key again to unmute the S/PDIF option.

By muting and unmuting the S/PDIF option, you can potentially resolve the crackling sound issue. This method has worked for some users who experienced similar problems.

If you are using a dock with a keyboard, mouse, and external monitor attached, this solution might work for you as well. Give it a try and let me know how it goes!

Please note that these instructions are specific to AlsaMixer and may not apply to other sound control applications.

I hope this helps!