PulseAudio: use multiple speakers

use_dual_monitor_speakers.sh

#!/bin/bash

# TODO: Update this strings with the actual values for your speakers
# TODO: Remember to also adjust the volumes to balance them (depending on their power and their distance from your location)
SPEAKER_1_NAME=alsa_output.pci-0000_03_00.1.hdmi-stereo
SPEAKER_1_VOLUME=80%
SPEAKER_2_NAME=alsa_output.pci-0000_03_00.6.analog-stereo
SPEAKER_2_VOLUME=100%

# Initially, remove previous state
pactl unload-module module-null-sink 2>/dev/null
pactl unload-module module-loopback 2>/dev/null

set -e

# 1. Create a fake sink null called "Dual Monitor"
pactl load-module module-null-sink sink_name=Dual_Monitor sink_properties=device.description="Dual_Monitor"

# 2. Connect fake sink to SPEAKER_1
pactl load-module module-loopback source=Dual_Monitor.monitor "sink=$SPEAKER_1_NAME" channels=2

# 3. Connect fake sink to SPEAKER_2
pactl load-module module-loopback source=Dual_Monitor.monitor "sink=$SPEAKER_2_NAME" channels=2

# 4. Set volume of Dual_monitor to 50%
pactl set-sink-mute Dual_Monitor false
pactl set-sink-volume Dual_Monitor 50%

# 5. Set volume of SPEAKER_1
pactl set-sink-mute $SPEAKER_1_NAME false
pactl set-sink-volume $SPEAKER_1_NAME $SPEAKER_1_VOLUME

# 6. Set volume of SPEAKER_2
pactl set-sink-mute $SPEAKER_2_NAME false
pactl set-sink-volume $SPEAKER_2_NAME $SPEAKER_2_VOLUME

# 7. Set the fake sink as the default audio sink
pactl set-default-sink Dual_Monitor

echo "Setup completed."
echo
echo "================="
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echo "================="