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https://github.com/zephrynis/nix-flake.git
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zephrynis
72fe33250d
Add a systemd user service (spotify-duck.py) that meters Discord's output stream and the denoised rnnoise mic via pw-record and lowers Spotify's volume via wpctl while anyone is speaking, restoring it a beat after silence. Tuning knobs are exposed as service Environment entries. Ignore Python __pycache__. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
54 lines
2.4 KiB
Nix
54 lines
2.4 KiB
Nix
{ pkgs, ... }:
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# Voice-activity ducking: while you OR someone else is speaking in a Discord
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# (Vesktop) voice call, Spotify's volume is lowered; it returns to normal a
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# beat after everyone goes quiet. Nothing else on the system is touched.
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#
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# The daemon (./spotify-duck.py) meters Discord's own output stream and your
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# denoised mic (rnnoise_source, from modules/noise-suppression.nix) directly via
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# `pw-record`, so it never reroutes audio and is independent of which output
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# device is active. See that file's header for the full rationale. Tune the
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# behaviour with the Environment entries below and `systemctl --user restart
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# spotify-duck` (no rebuild needed to experiment; make it permanent here after).
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let
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spotify-duck = pkgs.writeShellApplication {
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name = "spotify-duck";
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# pw-record/pw-dump live in pipewire; wpctl in wireplumber; python3 to run it.
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runtimeInputs = [ pkgs.python3 pkgs.pipewire pkgs.wireplumber ];
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text = ''exec python3 ${./spotify-duck.py} "$@"'';
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};
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in
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{
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systemd.user.services.spotify-duck = {
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Unit = {
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Description = "Duck Spotify while speaking on Discord (voice-activity)";
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After = [ "pipewire.service" "wireplumber.service" ];
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};
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Service = {
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ExecStart = "${spotify-duck}/bin/spotify-duck";
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Restart = "on-failure";
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RestartSec = 3;
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# Tuning knobs — override and `systemctl --user restart spotify-duck`.
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Environment = [
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"DUCK_LEVEL=0.35" # ducked volume = your current volume * this (35%)
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"MIC_THRESHOLD=0.004" # you-speaking RMS gate (measured: speech 0.004-0.015,
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# silence <0.0025 on rnnoise_source). Lower toward
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# 0.003 if soft speech is missed; raise if it dips
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# randomly.
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"DISC_THRESHOLD=0.008" # others-speaking RMS gate on Discord's output
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"RELEASE_MS=900" # restore this long after the last speech
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"MIC_TARGET=rnnoise_source" # mic node; the denoised source you use in Discord
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"DISCORD_APP=vesktop" # application.name of the Discord client
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"SPOTIFY_MATCH=spotify" # substring identifying Spotify's stream
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];
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};
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# default.target (not graphical-session.target) so it reliably starts on
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# login regardless of how the Hyprland session activates targets; the daemon
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# tolerates PipeWire not being up yet and self-heals.
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Install.WantedBy = [ "default.target" ];
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};
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}
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