Thanks! Adapted into a single command-line version for an alias/script that toggles: pactl unload-module module-loopback 2>&1 | grep -q 'Failed' && pactl l

Thanks! Adapted into a single command-line version for an alias/script that toggles: pactl unload-module module-loopback 2>&1 | grep -q 'Failed' && pactl load-module module-loopback > /dev/null I find the browser version useful too, as sometimes problems are browser-specific. E.g., the snap version of firefox has messed up permissions.