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In a shell script, I would like to change the selection of the input device (i.e. "Choose a device for sound input") in the "Input" tab of the "Sound Preferences" in Gnome.

Any ideas how to do this?

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Possibly "pacmd set-default-source" works if you are using pulseaudio, for example:

pacmd set-default-source alsa_input.usb-046d_0819_9F13DC90-02-U0x46d0x819.analog-mono

Find the source name using "pacmd list-source".

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