59 lines
1.9 KiB
Nix
59 lines
1.9 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) mkIf mkEnableOption;
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cfg = config.qenya.services.pipewire.lowLatency;
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in
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{
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options.qenya.services.pipewire.lowLatency = {
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enable = mkEnableOption "config to decrease sound latency (increasing CPU load) for e.g. streaming";
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# TODO: might be an idea to have the numbers be configurable
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};
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config = mkIf cfg.enable {
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# TODO: needs more testing
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services.pipewire.extraConfig = {
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pipewire."92-low-latency" = {
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context.properties = {
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default.clock.rate = 48000;
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default.clock.quantum = 32;
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default.clock.min-quantum = 32;
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default.clock.max-quantum = 32;
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};
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};
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pipewire-pulse."92-low-latency" = {
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context.modules = [
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{
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name = "libpipewire-module-protocol-pulse";
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args = {
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pulse.min.req = "32/48000";
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pulse.default.req = "32/48000";
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pulse.max.req = "32/48000";
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pulse.min.quantum = "32/48000";
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pulse.max.quantum = "32/48000";
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};
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}
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];
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stream.properties = {
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node.latency = "32/48000";
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resample.quality = 1;
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};
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};
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};
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# Available from NixOS 24.11. Lifted from https://nixos.wiki/wiki/PipeWire - probably need to adjust numbers
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# services.pipewire.wireplumber.extraLuaConfig.main."99-alsa-lowlatency" = ''
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# alsa_monitor.rules = {
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# {
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# matches = {{{ "node.name", "matches", "alsa_output.*" }}};
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# apply_properties = {
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# ["audio.format"] = "S32LE",
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# ["audio.rate"] = "96000", -- for USB soundcards it should be twice your desired rate
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# ["api.alsa.period-size"] = 2, -- defaults to 1024, tweak by trial-and-error
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# -- ["api.alsa.disable-batch"] = true, -- generally, USB soundcards use the batch mode
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# },
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# },
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# }
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# '';
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};
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}
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