Add easyeffects config

common/fragments/graphical/audio.nix

@@ -1,4 +1,4 @@
-{ pkgs, config, lib, ... }: {
+{ pkgs, lib, ... }: {
   # Pipewire
   security.rtkit.enable = true;
   services.pipewire = {
@@ -29,4 +29,62 @@
 
   # User packages
   users.users.agatha.packages = with pkgs; [ pamixer pavucontrol playerctl ];
+
+  home-manager.users.agatha = {
+    services.easyeffects = {
+      enable = true;
+      preset = "DT-770-flat-eq";
+    };
+
+    xdg.configFile."easyeffects/output/DT-770-flat-eq.json".text = let
+      band = num: freq: gain: ''
+        "band${toString num}": {
+             "frequency": ${toString freq},
+             "gain": ${toString gain},
+             "mode": "RLC (BT)",
+             "mute": false,
+             "q": 1.41,
+             "slope": "x1",
+             "solo": false,
+             "type": "Bell"
+        }
+      '';
+      bands = lib.concatStringsSep ''
+        ,
+      '' [
+        (band 0 31.0 5.8)
+        (band 1 62.0 8.0)
+        (band 2 125.0 (-8.03))
+        (band 3 250.0 (-2.42))
+        (band 4 500.0 0.71)
+        (band 5 1000.0 1.67)
+        (band 6 2000.0 (-2.42))
+        (band 7 4000.0 7.12)
+        (band 8 8000.0 (-0.61))
+        (band 9 16000.0 (-2.58))
+      ];
+    in ''
+      {
+          "output": {
+              "blocklist": [],
+              "equalizer": {
+                  "input-gain": 0.0,
+                  "left": {
+                    ${bands}
+                  },
+                  "mode": "IIR",
+                  "num-bands": 10,
+                  "output-gain": 0.0,
+                  "right": {
+                    ${bands}
+                  },
+                  "split-channels": false
+              },
+              "plugins_order": [
+                  "equalizer"
+              ]
+          }
+      }
+    '';
+  };
 }