[GH-ISSUE #1017] Mute function with external speaker #614

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opened 2026-05-05 06:22:31 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 06:22:31 -06:00

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Originally created by @olgkcn on GitHub (Apr 27, 2022).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1017

Before opening the issue, have you...?

Searched for existing issues
Read through the Monitor-Troubleshooting Wiki
Updated MonitorControl to the latest version (if applicable)

Describe the issue

I am using MonitorControl 4.0.2 on my Macbook Pro M1 with a Dell S2722DC monitor via USB-C cable. There is no problem with ordinary usage but when I connect a speaker to a monitor I can't mute the volume.

Expected behavior

The mute function should work when an external speaker connected to the monitor.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 12.3.1
- Mac model: MacBook Pro (13-inch, M1, 2020)
- MonitorControl version: 4.0.2
- Monitor(s): Dell S2722DC
- Monitor Cable(s)/Connection(s): Type C
- Apple Silicon/M1 (yes or no): Yes

Originally created by @olgkcn on GitHub (Apr 27, 2022). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1017 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Read through [the Monitor-Troubleshooting Wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the issue I am using MonitorControl 4.0.2 on my Macbook Pro M1 with a Dell S2722DC monitor via USB-C cable. There is no problem with ordinary usage but when I connect a speaker to a monitor I can't mute the volume. ### Expected behavior The mute function should work when an external speaker connected to the monitor. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 12.3.1 - Mac model: MacBook Pro (13-inch, M1, 2020) - MonitorControl version: 4.0.2 - Monitor(s): Dell S2722DC - Monitor Cable(s)/Connection(s): Type C - Apple Silicon/M1 (yes or no): Yes ```

gitea-mirror

2026-05-05 06:22:31 -06:00

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gitea-mirror commented

2026-05-05 06:22:40 -06:00

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@nskaiser commented on GitHub (Apr 28, 2022):

I have a very similar issue w/ the same setup. I also am plugging in external speaker to the Monitor audio out. I have disabled the speakers in the Dell config. The Mac volume controls work, but at the same time, they re-enable the Dell speaker output which I don't want. I want the Dell internal speakers to remain off always.

@nskaiser commented on GitHub (Apr 28, 2022): I have a very similar issue w/ the same setup. I also am plugging in external speaker to the Monitor audio out. I have disabled the speakers in the Dell config. The Mac volume controls work, but at the same time, they re-enable the Dell speaker output which I don't want. I want the Dell internal speakers to remain off always.

gitea-mirror commented

2026-05-05 06:22:42 -06:00

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@waydabber commented on GitHub (May 1, 2022):

This is entirely dependent on the display firmware implementation of the relevant DDC command. There is a theoretical DDC setting to specify the audio input but it is not implemented by any of the display manufacturers afaik. I am afraid there is no much to do with this on MonitorControl side.

@waydabber commented on GitHub (May 1, 2022): This is entirely dependent on the display firmware implementation of the relevant DDC command. There is a theoretical DDC setting to specify the audio input but it is not implemented by any of the display manufacturers afaik. I am afraid there is no much to do with this on MonitorControl side.

gitea-mirror commented

2026-05-05 06:22:43 -06:00

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@georgealways commented on GitHub (Jul 25, 2022):

Chiming in to say I've had an issue with mute using a very similar setup. My Macbook is connected to my monitor via USB-C, and the monitor to speakers via 3.5mm. When I mute, I can still hear audio, just incredibly faintly.

- macOS version: 12.5
- Mac model: MacBook Pro (16-inch, M1, 2020)
- MonitorControl version: 4.1.0
- Monitor(s): LG 34WK95U
- Monitor Cable(s)/Connection(s): Type C
- Apple Silicon/M1 (yes or no): Yes

Volume controls work perfectly otherwise. Thanks for the great app!

@georgealways commented on GitHub (Jul 25, 2022): Chiming in to say I've had an issue with mute using a very similar setup. My Macbook is connected to my monitor via USB-C, and the monitor to speakers via 3.5mm. When I mute, I can still hear audio, just incredibly faintly. ``` - macOS version: 12.5 - Mac model: MacBook Pro (16-inch, M1, 2020) - MonitorControl version: 4.1.0 - Monitor(s): LG 34WK95U - Monitor Cable(s)/Connection(s): Type C - Apple Silicon/M1 (yes or no): Yes ``` Volume controls work perfectly otherwise. Thanks for the great app!

gitea-mirror commented

2026-05-05 06:22:45 -06:00

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@waydabber commented on GitHub (Jul 26, 2022):

You can try using the alternate mute method, that helps in some cases. These kinds of issues are display firmware specific.

@waydabber commented on GitHub (Jul 26, 2022): You can try using the alternate mute method, that helps in some cases. These kinds of issues are display firmware specific.