setup-audio.sh

#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bash pulseaudio jalv pipewire tmux

set -euo pipefail
IFS=$'\n\t'

# Variables
outL="alsa_output.usb-Conexant_CONEXANT_USB_AUDIO_000000000000-00.analog-stereo:playback_FL"
outR="alsa_output.usb-Conexant_CONEXANT_USB_AUDIO_000000000000-00.analog-stereo:playback_FR"
inM="alsa_input.usb-Conexant_CONEXANT_USB_AUDIO_000000000000-00.mono-fallback:capture_MONO"

# Tmux session for jalv audio-plugins
tmux new-session -d -s "audio-session" || true

# Virtual audio out device for headset
pw-cli create-node adapter \
  '{ factory.name=support.null-audio-sink node.name=VirtualHeadset media.class=Audio/Sink object.linger=1 audio.position=[FL,FR] }'
pw-metadata 0 default.configured.audio.sink '{ "name": "VirtualHeadset" }'

echo "Loaded VirtualHeadset"

# Equalizer for Headset

tmux new-window -t "audio-session" -n "EQ" \
  jalv -l "$HOME/audio configs/impulse-response" "http://lsp-plug.in/plugins/lv2/impulse_responses_stereo"

echo "Started Equalizer"

sleep 1

pw-link VirtualHeadset:monitor_FL "LSP Impulse Responses Stereo:in_l"
pw-link VirtualHeadset:monitor_FR "LSP Impulse Responses Stereo:in_r"

echo "Linked Equalizer"

# Set volume of VirtualHeadset (-4.8dB) for preamp effect
# Replace with actual preamp?
pactl -- set-sink-volume VirtualHeadset 83%


# Connect last of chain to actual headset
pw-link "LSP Impulse Responses Stereo:out_l" $outL
pw-link "LSP Impulse Responses Stereo:out_r" $outR

echo "Linked Real Headset"


# Microphone
# Create VMic and set as default
pactl load-module module-null-sink media.class=Audio/Source/Virtual sink_name=VirtualMic channel_map=front-left,front-right
pactl set-default-source VirtualMic

echo "Loaded Virtual Microphone"

# Start Noise Gate (Activity Activated)

tmux new-window -t "audio-session" -n "noise-gate" \
  jalv -l "$HOME/audio configs/noise-gate" "http://lsp-plug.in/plugins/lv2/gate_mono"
echo "Started Noise Gate"

sleep 1
pw-link $inM "LSP Gate Mono:in"
echo "Linked Real Microphone to Noise Gate"

tmux new-window -t "audio-session" -n "noise-gate" \
  jalv -l "audio configs/denoiser" "https://github.com/lucianodato/speech-denoiser"

echo "Created Speech denoiser (rnn)"

sleep 2
pw-link "LSP Gate Mono:out" "Speech Denoiser:input"

echo "Linked Noise Gate to Speech Denoiser"

sleep 1

pw-link "Speech Denoiser:output" "VirtualMic:input_FL"
pw-link "Speech Denoiser:output" "VirtualMic:input_FR"
echo "Connected Speech Denoiser to VirtualMic"

# Output audio to virtualMic
pactl load-module module-null-sink media.class=Audio/Sink sink_name=SendToVirtualMic channel_map=front-left,front-right
echo "Loaded Virtual Microphone Sink"

sleep 1

pw-link "SendToVirtualMic:monitor_FL" "VirtualMic:input_FL"
pw-link "SendToVirtualMic:monitor_FR" "VirtualMic:input_FR"

echo "Linked SendToVirtualMic to VirtualMic"

pw-link "SendToVirtualMic:monitor_FL" "VirtualHeadset:playback_FL"
pw-link "SendToVirtualMic:monitor_FR" "VirtualHeadset:playback_FR"

echo "Linked SendToVirtualMic to VirtualHeadset"