Linux microphone switching

switch_mic.sh

#!/bin/bash

# Name of the device in pactl, use the following to discover names
# pactl list sources | grep -e 'Name' -e 'Description'
steel_series='alsa_input.usb-SteelSeries_Arctis_Pro_Wireless-00.analog-mono'
snowball='alsa_input.usb-BLUE_MICROPHONE_Blue_Snowball_201712-00.analog-stereo'

# Get the active source, ideally would use 'pactl get-default-source',
# but that isn't supported in my version of pulseaudio,
# Should be noted that this work around may break if there are multiple sources that are being used
active_source=`pactl list short sources | grep 'RUNNING' | cut -f 2`

# Change the default input device, and switch all applications actively using an input device to the new device
# Usage: set_source NAME|ID
function set_source() {
    echo "Switching to $1"
    
    # Change default input device
    pactl set-default-source "$1"
    
    # Move applications over to new device
    pactl list short source-outputs | while read stream; do
        streamId=`echo $stream|cut -f1`
        pactl move-source-output "$streamId" "$1"
    done
}

if [ "$active_source" = "$steel_series" ]; then
    set_source "$snowball"

elif [ "$active_source" = "$snowball" ]; then
    set_source "$steel_series"
fi