feat: improve audio latency

internal/installers/assets/etc/pipewire/pipewire.conf.d/99-low-latency.conf

@@ -1,8 +1,10 @@
-# https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#split-file-configuration
-# https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#setting-buffer-size-quantum
+# https://docs.pipewire.org/page_man_pipewire_conf_5.html
 context.properties = {
-    default.clock.min-quantum = 32
-    default.clock.quantum = 32
+    default.clock.quantum-floor = 8
+    default.clock.min-quantum = 8
+
+    default.clock.quantum = 16
+
     default.clock.max-quantum = 32
     default.clock.quantum-limit = 32
 }

internal/installers/assets/etc/wireplumber/wireplumber.conf.d/99-low-latency.conf

@@ -4,7 +4,8 @@ monitor.alsa.rules = [
   {
     matches = [
       {
-        node.name = "alsa_output.pci-0000_06_00.6.analog-stereo"
+        # PCI analog audio output (usually the 3.5mm audio jack)
+        device.name = "~alsa_output\.pci-.*\.analog-sterio"
       }
     ]
 

internal/installers/assets/home/.local/bin/osu

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
 
 OSU_PATH=$(find ~/Programs/AppImages -regex '.*gearlever_osu_.*\.appimage')
-gamemoderun $OSU_PATH
+# https://github.com/PipeWire/pipewire?tab=readme-ov-file#usage
+# osu! uses a sample rate of 44100 kHz instead of the usual 48000 kHz for some reason.
+# Setting PIPEWIRE_LATENCY=8/48000 does not force it to use 48kHz sample rate and I'm going to respect its default value.
+PIPEWIRE_LATENCY=8/48000 gamemoderun $OSU_PATH

internal/installers/pipewire.go

@@ -28,6 +28,9 @@ func init() {
 			//   - https://www.reddit.com/r/linuxaudio/comments/v66mj6/comment/ibjupwb
 			//   - https://learn.microsoft.com/en-us/windows-hardware/drivers/audio/low-latency-audio
 
+			// todo: https://docs.pipewire.org/page_man_pipewire-client_conf_5.html
+			// todo: https://docs.pipewire.org/page_man_pipewire-pulse_conf_5.html
+
 			wrapper.ParuOnce("pipewire")
 			wrapper.ParuOnce("pipewire-alsa")
 			wrapper.ParuOnce("pipewire-jack")