zephrynis/nix-flake
1
0
Fork 0
mirror of https://github.com/zephrynis/nix-flake.git synced 2026-08-18 05:55:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

home: auto-duck Spotify while speaking on Discord voice

Browse Source 
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>
This commit is contained in:
zephrynis
2026-07-31 10:29:25 +01:00
parent 3a53f5bf89
commit 72fe33250d
4 changed files with 300 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
home/spotify-ducking.nix Normal file
View File

@@ -0,0 +1,53 @@
{ pkgs, ... }:
# Voice-activity ducking: while you OR someone else is speaking in a Discord
# (Vesktop) voice call, Spotify's volume is lowered; it returns to normal a
# beat after everyone goes quiet. Nothing else on the system is touched.
#
# The daemon (./spotify-duck.py) meters Discord's own output stream and your
# denoised mic (rnnoise_source, from modules/noise-suppression.nix) directly via
# `pw-record`, so it never reroutes audio and is independent of which output
# device is active. See that file's header for the full rationale. Tune the
# behaviour with the Environment entries below and `systemctl --user restart
# spotify-duck` (no rebuild needed to experiment; make it permanent here after).
let
spotify-duck = pkgs.writeShellApplication {
name = "spotify-duck";
# pw-record/pw-dump live in pipewire; wpctl in wireplumber; python3 to run it.
runtimeInputs = [ pkgs.python3 pkgs.pipewire pkgs.wireplumber ];
text = ''exec python3 ${./spotify-duck.py} "$@"'';
};
in
{
systemd.user.services.spotify-duck = {
Unit = {
Description = "Duck Spotify while speaking on Discord (voice-activity)";
After = [ "pipewire.service" "wireplumber.service" ];
};
Service = {
ExecStart = "${spotify-duck}/bin/spotify-duck";
Restart = "on-failure";
RestartSec = 3;
# Tuning knobs — override and `systemctl --user restart spotify-duck`.
Environment = [
"DUCK_LEVEL=0.35" # ducked volume = your current volume * this (35%)
"MIC_THRESHOLD=0.004" # you-speaking RMS gate (measured: speech 0.004-0.015,
# silence <0.0025 on rnnoise_source). Lower toward
# 0.003 if soft speech is missed; raise if it dips
# randomly.
"DISC_THRESHOLD=0.008" # others-speaking RMS gate on Discord's output
"RELEASE_MS=900" # restore this long after the last speech
"MIC_TARGET=rnnoise_source" # mic node; the denoised source you use in Discord
"DISCORD_APP=vesktop" # application.name of the Discord client
"SPOTIFY_MATCH=spotify" # substring identifying Spotify's stream
];
};
# default.target (not graphical-session.target) so it reliably starts on
# login regardless of how the Hyprland session activates targets; the daemon
# tolerates PipeWire not being up yet and self-heals.
Install.WantedBy = [ "default.target" ];
};
}