This is Mac only. iOS does not allow it. See Vox on Mac vs iPhone.
Selecting it
1
Make sure your device is connected
Open Vox and check the connection state.
2
Open the other app's audio settings
Look for Input, Microphone, or Audio source.
3
Choose Vox
Choose Vox.
Where you will find the setting
Troubleshooting
Vox does not appear in the list
Vox does not appear in the list
In Vox, open Settings, then Vox audio. If the driver is not installed, click
Install Vox audio driver and then Install. If it is installed but macOS has
not loaded it, click Reload Vox audio driver, then Reload audio. macOS may
also require approval in Privacy & Security.
It appears but there is no sound
It appears but there is no sound
Check that the device is connected in Vox, and that the app has microphone
permission in System Settings, then Privacy and Security, then Microphone.
The audio is quiet or distorted
The audio is quiet or distorted
Test Vox in a quiet environment first so you understand the limits of dictation.
As a rule of thumb, speak louder when there is a lot of noise, but you should still
be able to speak quietly enough that a person three feet away cannot hear you.
It worked, then stopped after an update
It worked, then stopped after an update
Vox alerts you when the driver needs to be reinstalled or updated. Follow that
prompt, or open Settings → Vox audio and use the driver action shown there.