From 16f230730a3635513bd470e0eb901cb8c82c80cd Mon Sep 17 00:00:00 2001
From: isabel <isabel@isabelroses.com>
Date: Thu, 9 Jul 2026 13:42:36 +0100
Subject: [PATCH] nixos/hardware/media/sound: lossless / bluetooth take 2

---
 modules/nixos/hardware/media/sound.nix | 73 ++++++++++++++++++++------
 1 file changed, 57 insertions(+), 16 deletions(-)

diff --git a/modules/nixos/hardware/media/sound.nix b/modules/nixos/hardware/media/sound.nix
index 03f2922d..a5d7ca65 100644
--- a/modules/nixos/hardware/media/sound.nix
+++ b/modules/nixos/hardware/media/sound.nix
@@ -30,30 +30,71 @@ in
       extraLadspaPackages = [ pkgs.rnnoise-plugin ];
 
       extraConfig.pipewire = {
+        # <https://docs.pipewire.org/page_man_pipewire_conf_5.html>
+        "10-defaults" = {
+          "context.properties" = {
+            "core.daemon" = true;
+            "settings.check-quantum" = true;
+          };
+        };
+
         "10-loopback" = {
           "context.modules" = [
             {
-              "node.description" = "playback loop";
-              "audio.position" = [
-                "FL"
-                "FR"
-              ];
-
-              "capture.props" = {
-                "node.name" = "playback_sink";
-                "node.description" = "playback-sink";
-                "media.class" = "Audio/Sink";
-              };
+              name = "libpipewire-module-loopback";
+              args = {
+                "node.description" = "playback loop";
+                "audio.position" = [
+                  "FL"
+                  "FR"
+                ];
 
-              "playback.props" = {
-                "node.name" = "playback_sink.output";
-                "node.description" = "playback-sink-output";
-                "media.class" = "Audio/Source";
-                "node.passive" = true;
+                "capture.props" = {
+                  "node.name" = "playback_sink";
+                  "node.description" = "playback-sink";
+                  "media.class" = "Audio/Sink";
+                };
+
+                "playback.props" = {
+                  "node.name" = "playback_sink.output";
+                  "node.description" = "playback-sink-output";
+                  "media.class" = "Audio/Source";
+                  "node.passive" = true;
+                };
               };
             }
           ];
         };
+
+        "90-low-latency" = {
+          "context.properties" = {
+            "default.clock.rate" = 48000;
+            "default.clock.quantum" = 32;
+            "default.clock.min-quantum" = 32;
+            "default.clock.max-quantum" = 32;
+          };
+        };
+      };
+
+      wireplumber.extraConfig = {
+        "10-bluez" = {
+          "monitor.bluez.properties" = {
+            "bluez5.enable-sbc-xq" = true;
+            "bluez5.enable-msbc" = true;
+            "bluez5.enable-hw-volume" = true;
+            "bluez5.a2dp.ldac.quality" = "hq";
+            "bluez5.roles" = [
+              "a2dp_sink"
+              "a2dp_source"
+              "bap_sink"
+              "bap_source"
+              "hfp_hf"
+              "hfp_ag"
+              "hsp_hs"
+              "hsp_ag"
+            ];
+          };
+        };
       };
     };
   };
-- 
2.51.2