Skip to main content
Solved

HELP! Unable to disable audio "Thru" setting in Audio-MIDI Setup

  • September 10, 2020
  • 1 reply
  • 8 views

1ManRockBand
Forum|alt.badge.img+5

The company I work for has rolled out Mac Minis as Zoom Rooms in several of our conference rooms. Some of those rooms have A/V racks that connect ceiling mounted microphones and speakers to the computer through an external audio card on the Mac (currently the external audio card is a crappy logitech headset adapter, but audio quality doesn't seem to be an issue).

The problem is, the mic and speakers feed back if the mic gain is turned up too high unless the "Thru" checkbox is unchecked in Audio-MIDI setup (which makes sense).

I can uncheck the box manually, but Audio-MIDI setup resets itself and re-checks the box after the computer reboots, which is scheduled once a week since the computer is a Zoom Room device.

I haven't been able to find anything (aside from Applescript UI scripting, which I would prefer to not use if possible) to un-check that box via a script.

The most promising thing I've found so far is:

/Library/Preferences/Audio/com.apple.audio.DeviceSettings.plist

This plist seems to be related to the values for the volume sliders of the connected audio devices shown in Audio MIDI Setup (see photos)

Our Zoom Room Mac Mini deployment process is completely automated post-enrollment with scripts triggered by Jamf, and this is the last step.

I need to figure out how to make the un-checked "Thru" box keep its setting the same after a reboot instead of reverting.

Any help figuring this out would be greatly appreciated!

Best answer by 1ManRockBand

After some testing I was able to resolve this issue by using a TRRS adapter connected to the headphone jack on the mac mini.  TRRS is Tip (Audio L), Ring 1 (Audio R), Ring 2 (Ground), Sleeve (Microphone Input).

The mic input on the headphone jack on the mac mini has thru disabled by default with no option to turn it on, which fixes this problem.

View original
Did this topic help you find an answer to your question?

1ManRockBand
Forum|alt.badge.img+5

After some testing I was able to resolve this issue by using a TRRS adapter connected to the headphone jack on the mac mini.  TRRS is Tip (Audio L), Ring 1 (Audio R), Ring 2 (Ground), Sleeve (Microphone Input).

The mic input on the headphone jack on the mac mini has thru disabled by default with no option to turn it on, which fixes this problem.



Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings