Source audio mute doesn't work with VoiceOver screen reader on macOS

Operating System Info

Other

Other OS

macOS 12.3

OBS Studio Version

27.2.2

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/U1Tpoa9RarzCDlAq

OBS Studio Crash Log URL

No response

Expected Behavior

When using VoiceOver, activating the mute checkbox on a source with CTRL+OPT+Space should mute an audio source.

Current Behavior

Checkbox changes state, visual icon goes from grey speaker with waves to red speaker with X, but source is not muted. Meter remains colored.

Steps to Reproduce

1. Open OBS
2. Start VoiceOver - CMD+F5
3. Move VoiceOver to "mute [source name] audio unchecked checkbox" - CTRL+OPT+Right arrow multiple times
4. Activate checkbox - CTRL+OPT+Space

Anything else we should know?

The current workaround is to simulate a mouse click, by pressing CTRIL+OPT+CMD+5 to move the mouse cursor to the checkbox and then CTRL+OPT+SHIFT+Space to simulate the click action. This is a workaround, not a typical or recommended usage pattern.
This is a result of the mute action being bound to mousePressEvent, instead of the standard stateChanged provided by QCheckBox. This bug is present in all QCheckBox based controls.

Start by locating the QCheckBox-based controls whose mute action is bound to mousePressEvent, then compare that behavior with the standard stateChanged signal described in the issue. Done means activating the mute checkbox with VoiceOver using CTRL+OPT+Space mutes the source and the audio meter reflects the change.