dotfiles/modules/nixos/hardware/audio.nix

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{ config, pkgs, lib, ... }:
let
# These micro-scripts change the volume while also triggering the volume
# notification widget
increaseVolume = pkgs.writeShellScriptBin "increaseVolume" ''
${pkgs.pamixer}/bin/pamixer -i 2
volume=$(${pkgs.pamixer}/bin/pamixer --get-volume)
${pkgs.volnoti}/bin/volnoti-show $volume
'';
decreaseVolume = pkgs.writeShellScriptBin "decreaseVolume" ''
${pkgs.pamixer}/bin/pamixer -d 2
volume=$(${pkgs.pamixer}/bin/pamixer --get-volume)
${pkgs.volnoti}/bin/volnoti-show $volume
'';
toggleMute = pkgs.writeShellScriptBin "toggleMute" ''
${pkgs.pamixer}/bin/pamixer --toggle-mute
mute=$(${pkgs.pamixer}/bin/pamixer --get-mute)
if [ "$mute" == "true" ]; then
${pkgs.volnoti}/bin/volnoti-show --mute
else
volume=$(${pkgs.pamixer}/bin/pamixer --get-volume)
${pkgs.volnoti}/bin/volnoti-show $volume
fi
'';
in {
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config = lib.mkIf (pkgs.stdenv.isLinux && config.gui.enable) {
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sound.enable = true;
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# Enable PipeWire
services.pipewire = {
enable = true;
pulse.enable = true;
};
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# Provides audio source with background noise filtered
programs.noisetorch.enable = true;
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# These aren't necessary, but helpful for the user
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environment.systemPackages = with pkgs; [
pamixer # Audio control
volnoti # Volume notifications
];
home-manager.users.${config.user} = {
# Graphical volume notifications
services.volnoti.enable = true;
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xsession.windowManager.i3.config = {
# Make sure that Volnoti actually starts (home-manager doesn't start
# user daemon's automatically)
startup = [{
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command =
"systemctl --user restart volnoti --alpha 0.15 --radius 40 --timeout 0.2";
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always = true;
notification = false;
}];
# i3 keybinds for changing the volume
keybindings = {
"XF86AudioRaiseVolume" =
"exec --no-startup-id ${increaseVolume}/bin/increaseVolume";
"XF86AudioLowerVolume" =
"exec --no-startup-id ${decreaseVolume}/bin/decreaseVolume";
"XF86AudioMute" = "exec --no-startup-id ${toggleMute}/bin/toggleMute";
# We can mute the mic by adding "--default-source"
"XF86AudioMicMute" =
"exec --no-startup-id ${pkgs.pamixer}/bin/pamixer --default-source --toggle-mute";
};
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};
};
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};
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}