diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
index 80a9c10c864..2f4c12644fc 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/BUILD.gn
@@ -351,6 +351,7 @@ shared_library("LibWeb") {
            "UIEvents",
            "UserTiming",
            "WebAssembly",
+           "WebAudio",
            "WebDriver",
            "WebGL",
            "WebIDL",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/BUILD.gn
index a2f73aeafe3..b0e6d778de7 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/BUILD.gn
@@ -26,6 +26,7 @@ source_set("CSS") {
     "CSSStyleRule.cpp",
     "CSSStyleSheet.cpp",
     "CSSSupportsRule.cpp",
+    "CSSTransition.cpp",
     "CalculatedOr.cpp",
     "Clip.cpp",
     "Display.cpp",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn
new file mode 100644
index 00000000000..89dd5b1bbd1
--- /dev/null
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn
@@ -0,0 +1,26 @@
+source_set("WebAudio") {
+  configs += [ "//Userland/Libraries/LibWeb:configs" ]
+
+  deps = [ "//Userland/Libraries/LibWeb:all_generated" ]
+
+  sources = [
+    "AudioBuffer.cpp",
+    "AudioBuffer.h",
+    "AudioContext.cpp",
+    "AudioContext.h",
+    "AudioNode.cpp",
+    "AudioNode.h",
+    "AudioParam.cpp",
+    "AudioParam.h",
+    "AudioScheduledSourceNode.cpp",
+    "AudioScheduledSourceNode.h",
+    "BaseAudioContext.cpp",
+    "BaseAudioContext.h",
+    "OfflineAudioContext.cpp",
+    "OfflineAudioContext.h",
+    "OscillatorNode.cpp",
+    "OscillatorNode.h",
+    "PeriodicWave.cpp",
+    "PeriodicWave.h",
+  ]
+}
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
index 2706f3be06e..bdac7e4ddda 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
@@ -45,6 +45,7 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/CSS/CSSStyleRule.idl",
   "//Userland/Libraries/LibWeb/CSS/CSSStyleSheet.idl",
   "//Userland/Libraries/LibWeb/CSS/CSSSupportsRule.idl",
+  "//Userland/Libraries/LibWeb/CSS/CSSTransition.idl",
   "//Userland/Libraries/LibWeb/CSS/FontFace.idl",
   "//Userland/Libraries/LibWeb/CSS/FontFaceSet.idl",
   "//Userland/Libraries/LibWeb/CSS/MediaList.idl",
@@ -114,9 +115,9 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.idl",
   "//Userland/Libraries/LibWeb/HTML/CloseEvent.idl",
   "//Userland/Libraries/LibWeb/HTML/CustomElements/CustomElementRegistry.idl",
+  "//Userland/Libraries/LibWeb/HTML/DataTransfer.idl",
   "//Userland/Libraries/LibWeb/HTML/DOMParser.idl",
   "//Userland/Libraries/LibWeb/HTML/DOMStringMap.idl",
-  "//Userland/Libraries/LibWeb/HTML/DataTransfer.idl",
   "//Userland/Libraries/LibWeb/HTML/ErrorEvent.idl",
   "//Userland/Libraries/LibWeb/HTML/FormDataEvent.idl",
   "//Userland/Libraries/LibWeb/HTML/HashChangeEvent.idl",
@@ -307,6 +308,15 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/WebAssembly/Memory.idl",
   "//Userland/Libraries/LibWeb/WebAssembly/Module.idl",
   "//Userland/Libraries/LibWeb/WebAssembly/Table.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/AudioBuffer.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/AudioContext.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/AudioNode.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/AudioParam.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/AudioScheduledSourceNode.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/BaseAudioContext.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/OfflineAudioContext.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/OscillatorNode.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/PeriodicWave.idl",
   "//Userland/Libraries/LibWeb/WebGL/WebGLContextEvent.idl",
   "//Userland/Libraries/LibWeb/WebGL/WebGLRenderingContext.idl",
   "//Userland/Libraries/LibWeb/WebIDL/DOMException.idl",