diff --git a/components/script/dom/audionode.rs b/components/script/dom/audionode.rs
index 204f38e2e5d..48751dabeac 100644
--- a/components/script/dom/audionode.rs
+++ b/components/script/dom/audionode.rs
@@ -237,9 +237,10 @@ impl AudioNodeMethods for AudioNode {
                 }
             },
             EventTargetTypeId::AudioNode(AudioNodeTypeId::ChannelMergerNode) => {
-                if value != 1 {
-                    return Err(Error::InvalidState);
-                }
+                return Err(Error::InvalidState);
+            },
+            EventTargetTypeId::AudioNode(AudioNodeTypeId::ChannelSplitterNode) => {
+                return Err(Error::InvalidState);
             },
             // XXX We do not support any of the other AudioNodes with
             // constraints yet. Add more cases here as we add support
@@ -280,9 +281,10 @@ impl AudioNodeMethods for AudioNode {
                 }
             },
             EventTargetTypeId::AudioNode(AudioNodeTypeId::ChannelMergerNode) => {
-                if value != ChannelCountMode::Explicit {
-                    return Err(Error::InvalidState);
-                }
+                return Err(Error::InvalidState);
+            },
+            EventTargetTypeId::AudioNode(AudioNodeTypeId::ChannelSplitterNode) => {
+                return Err(Error::InvalidState);
             },
             // XXX We do not support any of the other AudioNodes with
             // constraints yet. Add more cases here as we add support
@@ -301,14 +303,22 @@ impl AudioNodeMethods for AudioNode {
     }
 
     // https://webaudio.github.io/web-audio-api/#dom-audionode-channelinterpretation
-    fn SetChannelInterpretation(&self, value: ChannelInterpretation) {
+    fn SetChannelInterpretation(&self, value: ChannelInterpretation) -> ErrorResult {
         // Channel interpretation mode has no effect for nodes with no inputs.
         if self.number_of_inputs == 0 {
-            return;
+            return Ok(());
         }
 
+        match self.upcast::<EventTarget>().type_id() {
+            EventTargetTypeId::AudioNode(AudioNodeTypeId::ChannelSplitterNode) => {
+                return Err(Error::InvalidState);
+            },
+            _ => (),
+        };
+
         self.channel_interpretation.set(value);
         self.message(AudioNodeMessage::SetChannelInterpretation(value.into()));
+        Ok(())
     }
 }
 
diff --git a/components/script/dom/baseaudiocontext.rs b/components/script/dom/baseaudiocontext.rs
index 697b152ee69..9429a03c1aa 100644
--- a/components/script/dom/baseaudiocontext.rs
+++ b/components/script/dom/baseaudiocontext.rs
@@ -22,6 +22,7 @@ use crate::dom::bindings::codegen::Bindings::BaseAudioContextBinding::DecodeErro
 use crate::dom::bindings::codegen::Bindings::BaseAudioContextBinding::DecodeSuccessCallback;
 use crate::dom::bindings::codegen::Bindings::BiquadFilterNodeBinding::BiquadFilterOptions;
 use crate::dom::bindings::codegen::Bindings::ChannelMergerNodeBinding::ChannelMergerOptions;
+use crate::dom::bindings::codegen::Bindings::ChannelSplitterNodeBinding::ChannelSplitterOptions;
 use crate::dom::bindings::codegen::Bindings::GainNodeBinding::GainOptions;
 use crate::dom::bindings::codegen::Bindings::OscillatorNodeBinding::OscillatorOptions;
 use crate::dom::bindings::codegen::Bindings::PannerNodeBinding::PannerOptions;
@@ -33,6 +34,7 @@ use crate::dom::bindings::reflector::DomObject;
 use crate::dom::bindings::root::{DomRoot, MutNullableDom};
 use crate::dom::biquadfilternode::BiquadFilterNode;
 use crate::dom::channelmergernode::ChannelMergerNode;
+use crate::dom::channelsplitternode::ChannelSplitterNode;
 use crate::dom::domexception::{DOMErrorName, DOMException};
 use crate::dom::eventtarget::EventTarget;
 use crate::dom::gainnode::GainNode;
@@ -360,6 +362,13 @@ impl BaseAudioContextMethods for BaseAudioContext {
         ChannelMergerNode::new(&self.global().as_window(), &self, &opts)
     }
 
+    /// https://webaudio.github.io/web-audio-api/#dom-baseaudiocontext-createchannelsplitter
+    fn CreateChannelSplitter(&self, count: u32) -> Fallible<DomRoot<ChannelSplitterNode>> {
+        let mut opts = ChannelSplitterOptions::empty();
+        opts.numberOfOutputs = count;
+        ChannelSplitterNode::new(&self.global().as_window(), &self, &opts)
+    }
+
     /// https://webaudio.github.io/web-audio-api/#dom-baseaudiocontext-createbuffer
     fn CreateBuffer(
         &self,
diff --git a/components/script/dom/channelsplitternode.rs b/components/script/dom/channelsplitternode.rs
new file mode 100644
index 00000000000..6803e3e5a67
--- /dev/null
+++ b/components/script/dom/channelsplitternode.rs
@@ -0,0 +1,80 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::audionode::{AudioNode, MAX_CHANNEL_COUNT};
+use crate::dom::baseaudiocontext::BaseAudioContext;
+use crate::dom::bindings::codegen::Bindings::AudioNodeBinding::{
+    ChannelCountMode, ChannelInterpretation,
+};
+use crate::dom::bindings::codegen::Bindings::ChannelSplitterNodeBinding::{
+    self, ChannelSplitterOptions,
+};
+use crate::dom::bindings::error::{Error, Fallible};
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::window::Window;
+use dom_struct::dom_struct;
+use servo_media::audio::node::AudioNodeInit;
+
+#[dom_struct]
+pub struct ChannelSplitterNode {
+    node: AudioNode,
+}
+
+impl ChannelSplitterNode {
+    #[allow(unrooted_must_root)]
+    pub fn new_inherited(
+        _: &Window,
+        context: &BaseAudioContext,
+        options: &ChannelSplitterOptions,
+    ) -> Fallible<ChannelSplitterNode> {
+        if options.numberOfOutputs < 1 || options.numberOfOutputs > MAX_CHANNEL_COUNT {
+            return Err(Error::IndexSize);
+        }
+
+        let node_options = options.parent.unwrap_or(
+            options.numberOfOutputs,
+            ChannelCountMode::Explicit,
+            ChannelInterpretation::Discrete,
+        );
+
+        if node_options.count != options.numberOfOutputs ||
+            node_options.mode != ChannelCountMode::Explicit ||
+            node_options.interpretation != ChannelInterpretation::Discrete
+        {
+            return Err(Error::InvalidState);
+        }
+
+        let node = AudioNode::new_inherited(
+            AudioNodeInit::ChannelSplitterNode,
+            context,
+            node_options,
+            1,                       // inputs
+            options.numberOfOutputs, // outputs
+        )?;
+        Ok(ChannelSplitterNode { node })
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(
+        window: &Window,
+        context: &BaseAudioContext,
+        options: &ChannelSplitterOptions,
+    ) -> Fallible<DomRoot<ChannelSplitterNode>> {
+        let node = ChannelSplitterNode::new_inherited(window, context, options)?;
+        Ok(reflect_dom_object(
+            Box::new(node),
+            window,
+            ChannelSplitterNodeBinding::Wrap,
+        ))
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        context: &BaseAudioContext,
+        options: &ChannelSplitterOptions,
+    ) -> Fallible<DomRoot<ChannelSplitterNode>> {
+        ChannelSplitterNode::new(window, context, options)
+    }
+}
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 253dc2b54bb..675b9dcd403 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -244,6 +244,7 @@ pub mod canvasgradient;
 pub mod canvaspattern;
 pub mod canvasrenderingcontext2d;
 pub mod channelmergernode;
+pub mod channelsplitternode;
 pub mod characterdata;
 pub mod client;
 pub mod closeevent;
diff --git a/components/script/dom/webidls/AudioNode.webidl b/components/script/dom/webidls/AudioNode.webidl
index f5e51689cf2..bf4f88e02b6 100644
--- a/components/script/dom/webidls/AudioNode.webidl
+++ b/components/script/dom/webidls/AudioNode.webidl
@@ -57,5 +57,6 @@ interface AudioNode : EventTarget {
   attribute unsigned long channelCount;
   [SetterThrows]
   attribute ChannelCountMode channelCountMode;
+  [SetterThrows]
   attribute ChannelInterpretation channelInterpretation;
 };
diff --git a/components/script/dom/webidls/BaseAudioContext.webidl b/components/script/dom/webidls/BaseAudioContext.webidl
index 5c475d5233a..0f645177d31 100644
--- a/components/script/dom/webidls/BaseAudioContext.webidl
+++ b/components/script/dom/webidls/BaseAudioContext.webidl
@@ -45,7 +45,7 @@ interface BaseAudioContext : EventTarget {
   [Throws] PannerNode createPanner();
   // StereoPannerNode createStereoPanner();
   // ConvolverNode createConvolver();
-  // ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs = 6);
+  [Throws] ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs = 6);
   [Throws] ChannelMergerNode createChannelMerger(optional unsigned long numberOfInputs = 6);
   // DynamicsCompressorNode createDynamicsCompressor();
   [Throws]  OscillatorNode createOscillator();
diff --git a/components/script/dom/webidls/ChannelSplitterNode.webidl b/components/script/dom/webidls/ChannelSplitterNode.webidl
new file mode 100644
index 00000000000..1056fce61bf
--- /dev/null
+++ b/components/script/dom/webidls/ChannelSplitterNode.webidl
@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/#channelsplitternode
+ */
+
+dictionary ChannelSplitterOptions : AudioNodeOptions {
+  unsigned long numberOfOutputs = 6;
+};
+
+[Exposed=Window,
+ Constructor (BaseAudioContext context, optional ChannelSplitterOptions options)]
+interface ChannelSplitterNode : AudioNode {
+};
diff --git a/tests/wpt/metadata/webaudio/idlharness.https.window.js.ini b/tests/wpt/metadata/webaudio/idlharness.https.window.js.ini
index cc847e7578d..97d23d249e2 100644
--- a/tests/wpt/metadata/webaudio/idlharness.https.window.js.ini
+++ b/tests/wpt/metadata/webaudio/idlharness.https.window.js.ini
@@ -1,7 +1,4 @@
 [idlharness.https.window.html]
-  [BaseAudioContext interface: operation createChannelSplitter(unsigned long)]
-    expected: FAIL
-
   [AudioNode interface: calling connect(AudioNode, unsigned long, unsigned long) on new ConvolverNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
@@ -35,9 +32,6 @@
   [AudioNode interface: calling disconnect(AudioNode) on new ConvolverNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "channelCountMode" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: new ConstantSourceNode(context) must inherit property "disconnect(unsigned long)" with the proper type]
     expected: FAIL
 
@@ -65,9 +59,6 @@
   [ScriptProcessorNode interface: context.createScriptProcessor() must inherit property "onaudioprocess" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [MediaElementAudioSourceNode interface: existence and properties of interface prototype object's @@unscopables property]
     expected: FAIL
 
@@ -107,9 +98,6 @@
   [AudioNode interface: new MediaElementAudioSourceNode(context, {mediaElement: new Audio}) must inherit property "disconnect(AudioNode, unsigned long, unsigned long)" with the proper type]
     expected: FAIL
 
-  [ChannelSplitterNode interface: existence and properties of interface prototype object's "constructor" property]
-    expected: FAIL
-
   [AudioNode interface: new MediaStreamAudioDestinationNode(context) must inherit property "context" with the proper type]
     expected: FAIL
 
@@ -131,9 +119,6 @@
   [Stringification of new StereoPannerNode(context)]
     expected: FAIL
 
-  [ChannelSplitterNode interface object name]
-    expected: FAIL
-
   [AudioContext interface: operation close()]
     expected: FAIL
 
@@ -161,9 +146,6 @@
   [ScriptProcessorNode must be primary interface of context.createScriptProcessor()]
     expected: FAIL
 
-  [BaseAudioContext interface: new OfflineAudioContext(1, 1, sample_rate) must inherit property "createChannelSplitter(unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: new DynamicsCompressorNode(context) must inherit property "disconnect(unsigned long)" with the proper type]
     expected: FAIL
 
@@ -212,9 +194,6 @@
   [AudioWorkletNode interface: existence and properties of interface object]
     expected: FAIL
 
-  [Stringification of new ChannelSplitterNode(context)]
-    expected: FAIL
-
   [AudioNode interface: context.createScriptProcessor() must inherit property "disconnect(unsigned long)" with the proper type]
     expected: FAIL
 
@@ -320,9 +299,6 @@
   [AudioNode interface: new MediaElementAudioSourceNode(context, {mediaElement: new Audio}) must inherit property "channelCountMode" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "numberOfInputs" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: calling connect(AudioParam, unsigned long) on new DelayNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
@@ -335,9 +311,6 @@
   [MediaStreamAudioSourceNode interface object name]
     expected: FAIL
 
-  [ChannelSplitterNode interface object length]
-    expected: FAIL
-
   [AudioContext interface: context must inherit property "createMediaStreamTrackSource(MediaStreamTrack)" with the proper type]
     expected: FAIL
 
@@ -359,27 +332,18 @@
   [IIRFilterNode interface: operation getFrequencyResponse(Float32Array, Float32Array, Float32Array)]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(AudioNode)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: calling disconnect(AudioParam, unsigned long) on new ConstantSourceNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
   [AudioNode interface: context.createScriptProcessor() must inherit property "connect(AudioParam, unsigned long)" with the proper type]
     expected: FAIL
 
-  [ChannelSplitterNode interface: existence and properties of interface prototype object]
-    expected: FAIL
-
   [AudioNode interface: new ConvolverNode(context) must inherit property "disconnect(unsigned long)" with the proper type]
     expected: FAIL
 
   [MediaStreamAudioDestinationNode interface: existence and properties of interface prototype object's @@unscopables property]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(AudioNode, unsigned long, unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioParamMap interface: existence and properties of interface object]
     expected: FAIL
 
@@ -578,9 +542,6 @@
   [MediaStreamAudioDestinationNode interface: existence and properties of interface prototype object]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(AudioParam) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioNode interface: new WaveShaperNode(context) must inherit property "connect(AudioNode, unsigned long, unsigned long)" with the proper type]
     expected: FAIL
 
@@ -626,9 +587,6 @@
   [AudioNode interface: calling disconnect(AudioParam, unsigned long) on new MediaElementAudioSourceNode(context, {mediaElement: new Audio}) with too few arguments must throw TypeError]
     expected: FAIL
 
-  [AudioNode interface: calling connect(AudioNode, unsigned long, unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioNode interface: new DynamicsCompressorNode(context) must inherit property "disconnect(AudioParam, unsigned long)" with the proper type]
     expected: FAIL
 
@@ -701,9 +659,6 @@
   [AudioWorkletNode interface: existence and properties of interface prototype object]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "channelInterpretation" with the proper type]
-    expected: FAIL
-
   [BaseAudioContext interface: new OfflineAudioContext(1, 1, sample_rate) must inherit property "createScriptProcessor(unsigned long, unsigned long, unsigned long)" with the proper type]
     expected: FAIL
 
@@ -740,9 +695,6 @@
   [AudioNode interface: calling connect(AudioParam, unsigned long) on new WaveShaperNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
-  [BaseAudioContext interface: context must inherit property "createChannelSplitter(unsigned long)" with the proper type]
-    expected: FAIL
-
   [OscillatorNode interface: new OscillatorNode(context) must inherit property "setPeriodicWave(PeriodicWave)" with the proper type]
     expected: FAIL
 
@@ -755,9 +707,6 @@
   [Stringification of new AudioProcessingEvent('', {\n        playbackTime: 0, inputBuffer: buffer, outputBuffer: buffer\n      })]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(AudioNode, unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: worklet_node must inherit property "channelCount" with the proper type]
     expected: FAIL
 
@@ -806,9 +755,6 @@
   [AudioParam interface: operation setValueCurveAtTime([object Object\], double, double)]
     expected: FAIL
 
-  [BaseAudioContext interface: calling createChannelSplitter(unsigned long) on new OfflineAudioContext(1, 1, sample_rate) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [BaseAudioContext interface: operation createIIRFilter([object Object\], [object Object\])]
     expected: FAIL
 
@@ -863,12 +809,6 @@
   [AudioNode interface: new MediaElementAudioSourceNode(context, {mediaElement: new Audio}) must inherit property "context" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect()" with the proper type]
-    expected: FAIL
-
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "connect(AudioNode, unsigned long, unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: calling disconnect(AudioParam, unsigned long) on new DelayNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
@@ -890,9 +830,6 @@
   [WaveShaperNode interface: new WaveShaperNode(context) must inherit property "curve" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: new IIRFilterNode(context, {feedforward: [1\], feedback: [1\]}) must inherit property "connect(AudioParam, unsigned long)" with the proper type]
     expected: FAIL
 
@@ -917,9 +854,6 @@
   [DynamicsCompressorNode interface: new DynamicsCompressorNode(context) must inherit property "ratio" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "context" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: new MediaStreamAudioDestinationNode(context) must inherit property "numberOfOutputs" with the proper type]
     expected: FAIL
 
@@ -935,18 +869,12 @@
   [DynamicsCompressorNode interface: attribute release]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "numberOfOutputs" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: calling disconnect(AudioParam, unsigned long) on new IIRFilterNode(context, {feedforward: [1\], feedback: [1\]}) with too few arguments must throw TypeError]
     expected: FAIL
 
   [ConvolverNode interface: attribute buffer]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(AudioParam, unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioNode interface: calling disconnect(AudioNode) on new MediaElementAudioSourceNode(context, {mediaElement: new Audio}) with too few arguments must throw TypeError]
     expected: FAIL
 
@@ -1055,9 +983,6 @@
   [AudioNode interface: calling disconnect(AudioNode) on context.createScriptProcessor() with too few arguments must throw TypeError]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "channelCount" with the proper type]
-    expected: FAIL
-
   [PeriodicWave interface: existence and properties of interface prototype object's @@unscopables property]
     expected: FAIL
 
@@ -1076,9 +1001,6 @@
   [ConstantSourceNode interface: new ConstantSourceNode(context) must inherit property "offset" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(AudioNode, unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioNode interface: new WaveShaperNode(context) must inherit property "numberOfInputs" with the proper type]
     expected: FAIL
 
@@ -1097,9 +1019,6 @@
   [IIRFilterNode interface: new IIRFilterNode(context, {feedforward: [1\], feedback: [1\]}) must inherit property "getFrequencyResponse(Float32Array, Float32Array, Float32Array)" with the proper type]
     expected: FAIL
 
-  [ChannelSplitterNode interface: existence and properties of interface object]
-    expected: FAIL
-
   [AudioScheduledSourceNode interface: new ConstantSourceNode(context) must inherit property "stop(double)" with the proper type]
     expected: FAIL
 
@@ -1244,9 +1163,6 @@
   [AudioNode interface: new MediaStreamAudioDestinationNode(context) must inherit property "channelInterpretation" with the proper type]
     expected: FAIL
 
-  [BaseAudioContext interface: calling createChannelSplitter(unsigned long) on context with too few arguments must throw TypeError]
-    expected: FAIL
-
   [AudioNode interface: new WaveShaperNode(context) must inherit property "connect(AudioParam, unsigned long)" with the proper type]
     expected: FAIL
 
@@ -1307,12 +1223,6 @@
   [MediaStreamTrackAudioSourceNode interface object name]
     expected: FAIL
 
-  [ChannelSplitterNode interface: existence and properties of interface prototype object's @@unscopables property]
-    expected: FAIL
-
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(AudioParam, unsigned long)" with the proper type]
-    expected: FAIL
-
   [Stringification of context.createScriptProcessor()]
     expected: FAIL
 
@@ -1331,9 +1241,6 @@
   [DynamicsCompressorNode interface object name]
     expected: FAIL
 
-  [AudioNode interface: calling connect(AudioParam, unsigned long) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [WaveShaperNode interface: existence and properties of interface prototype object]
     expected: FAIL
 
@@ -1370,9 +1277,6 @@
   [AudioNode interface: new DelayNode(context) must inherit property "numberOfOutputs" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(AudioNode, unsigned long, unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: new MediaStreamAudioDestinationNode(context) must inherit property "disconnect(AudioParam)" with the proper type]
     expected: FAIL
 
@@ -1424,9 +1328,6 @@
   [AudioNode interface: context.createScriptProcessor() must inherit property "disconnect(AudioNode, unsigned long)" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: calling disconnect(AudioNode) on new ChannelSplitterNode(context) with too few arguments must throw TypeError]
-    expected: FAIL
-
   [WaveShaperNode interface: existence and properties of interface prototype object's "constructor" property]
     expected: FAIL
 
@@ -1445,9 +1346,6 @@
   [AudioNode interface: new MediaStreamAudioDestinationNode(context) must inherit property "connect(AudioParam, unsigned long)" with the proper type]
     expected: FAIL
 
-  [ChannelSplitterNode must be primary interface of new ChannelSplitterNode(context)]
-    expected: FAIL
-
   [Stringification of new MediaStreamAudioDestinationNode(context)]
     expected: FAIL
 
@@ -1466,9 +1364,6 @@
   [Stringification of new DynamicsCompressorNode(context)]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "disconnect(AudioParam)" with the proper type]
-    expected: FAIL
-
   [StereoPannerNode interface: existence and properties of interface prototype object's @@unscopables property]
     expected: FAIL
 
@@ -1595,9 +1490,6 @@
   [AudioProcessingEvent interface: new AudioProcessingEvent('', {\n        playbackTime: 0, inputBuffer: buffer, outputBuffer: buffer\n      }) must inherit property "inputBuffer" with the proper type]
     expected: FAIL
 
-  [AudioNode interface: new ChannelSplitterNode(context) must inherit property "connect(AudioParam, unsigned long)" with the proper type]
-    expected: FAIL
-
   [AudioNode interface: context.createScriptProcessor() must inherit property "disconnect(AudioNode)" with the proper type]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audionode-interface/audionode-disconnect.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audionode-interface/audionode-disconnect.html.ini
index 45d61e35bb6..10736e7e87a 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audionode-interface/audionode-disconnect.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audionode-interface/audionode-disconnect.html.ini
@@ -1,2 +1,28 @@
 [audionode-disconnect.html]
-  expected: ERROR
+  [X splitter.disconnect(gain2, 2) did not throw an exception.]
+    expected: FAIL
+
+  [X splitter.disconnect(2) did not throw an exception.]
+    expected: FAIL
+
+  [X gain1.disconnect(gain3) did not throw an exception.]
+    expected: FAIL
+
+  [# AUDIT TASK RUNNER FINISHED: 1 out of 7 tasks were failed.]
+    expected: FAIL
+
+  [X splitter.disconnect(gain3, 0, 0) did not throw an exception.]
+    expected: FAIL
+
+  [X splitter.disconnect(merger, 3, 0) did not throw an exception.]
+    expected: FAIL
+
+  [< [exceptions\] 7 out of 8 assertions were failed.]
+    expected: FAIL
+
+  [X gain1.disconnect(gain2) did not throw an exception.]
+    expected: FAIL
+
+  [X splitter.disconnect(gain1, 0) did not throw an exception.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/audiochannelsplitter.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/audiochannelsplitter.html.ini
deleted file mode 100644
index 32e0f35871f..00000000000
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/audiochannelsplitter.html.ini
+++ /dev/null
@@ -1,11 +0,0 @@
-[audiochannelsplitter.html]
-  expected: ERROR
-  [X createChannelSplitter(33) threw "TypeError" instead of IndexSizeError.]
-    expected: FAIL
-
-  [X splitternode = context.createChannelSplitter(32) incorrectly threw TypeError: "context.createChannelSplitter is not a function".]
-    expected: FAIL
-
-  [X createChannelSplitter(0) threw "TypeError" instead of IndexSizeError.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/ctor-channelsplitter.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/ctor-channelsplitter.html.ini
deleted file mode 100644
index 65bfcd5f405..00000000000
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-channelsplitternode-interface/ctor-channelsplitter.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[ctor-channelsplitter.html]
-  expected: ERROR
-  [X node0 = new ChannelSplitterNode(context) incorrectly threw TypeError: "window[name\] is not a constructor".]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-gainnode-interface/gain.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-gainnode-interface/gain.html.ini
index 4c84e0baf87..831bcdd7e3d 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-gainnode-interface/gain.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-gainnode-interface/gain.html.ini
@@ -1,2 +1,13 @@
 [gain.html]
-  expected: ERROR
+  [X Left SNR (in dB) is not greater than or equal to 148.69. Got NaN.]
+    expected: FAIL
+
+  [X Right SNR (in dB) is not greater than or equal to 148.69. Got NaN.]
+    expected: FAIL
+
+  [# AUDIT TASK RUNNER FINISHED: 1 out of 2 tasks were failed.]
+    expected: FAIL
+
+  [< [test\] 2 out of 4 assertions were failed.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-automation-position.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-automation-position.html.ini
index 2c76c302d1b..95df5efaaac 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-automation-position.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-automation-position.html.ini
@@ -1,2 +1,22 @@
 [panner-automation-position.html]
-  expected: ERROR
+  [# AUDIT TASK RUNNER FINISHED: 2 out of 8 tasks were failed.]
+    expected: FAIL
+
+  [X 2-channel [0, 0, 1\] -> [0, 0, 10000\]: distanceModel: inverse, rolloff: 1, right channel does not equal [2,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16,2.4492937051703357e-16...\] with an element-wise tolerance of {"absoluteThreshold":0,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[0\]\t0.0000000000000000e+0\t2.0000000000000000e+0\t2.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[1\]\t0.0000000000000000e+0\t2.4492937051703357e-16\t2.4492937051703357e-16\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[2\]\t0.0000000000000000e+0\t2.4492937051703357e-16\t2.4492937051703357e-16\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[3\]\t0.0000000000000000e+0\t2.4492937051703357e-16\t2.4492937051703357e-16\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[4\]\t0.0000000000000000e+0\t2.4492937051703357e-16\t2.4492937051703357e-16\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t...and 251 more errors.\n\tMax AbsError of 2.0000000000000000e+0 at index of 0.\n\tMax RelError of 1.0000000000000000e+0 at index of 0.\n]
+    expected: FAIL
+
+  [X 1-channel [0, 0, 1\] -> [0, 0, 10000\]: distanceModel: inverse, rolloff: 1, left channel does not equal [0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304,-0.7071067690849304...\] with an element-wise tolerance of {"absoluteThreshold":0,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[0\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[1\]\t0.0000000000000000e+0\t-7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[2\]\t0.0000000000000000e+0\t-7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[3\]\t0.0000000000000000e+0\t-7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[4\]\t0.0000000000000000e+0\t-7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t...and 251 more errors.\n\tMax AbsError of 7.0710676908493042e-1 at index of 0.\n\tMax RelError of 1.0000000000000000e+0 at index of 0.\n]
+    expected: FAIL
+
+  [X 1-channel [0, 0, 1\] -> [0, 0, 10000\]: distanceModel: inverse, rolloff: 1, right channel does not equal [0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304,0.7071067690849304...\] with an element-wise tolerance of {"absoluteThreshold":0,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[0\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[1\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[2\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[3\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[4\]\t0.0000000000000000e+0\t7.0710676908493042e-1\t7.0710676908493042e-1\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t...and 251 more errors.\n\tMax AbsError of 7.0710676908493042e-1 at index of 0.\n\tMax RelError of 1.0000000000000000e+0 at index of 0.\n]
+    expected: FAIL
+
+  [X 2-channel [0, 0, 1\] -> [0, 0, 10000\]: distanceModel: inverse, rolloff: 1, left channel does not equal [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1...\] with an element-wise tolerance of {"absoluteThreshold":0,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[0\]\t0.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[1\]\t0.0000000000000000e+0\t-1.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[2\]\t0.0000000000000000e+0\t-1.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[3\]\t0.0000000000000000e+0\t-1.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t[4\]\t0.0000000000000000e+0\t-1.0000000000000000e+0\t1.0000000000000000e+0\t1.0000000000000000e+0\t0.0000000000000000e+0\n\t...and 251 more errors.\n\tMax AbsError of 1.0000000000000000e+0 at index of 0.\n\tMax RelError of 1.0000000000000000e+0 at index of 0.\n]
+    expected: FAIL
+
+  [< [0: 2-channel inverse rolloff: 1\] 2 out of 2 assertions were failed.]
+    expected: FAIL
+
+  [< [0: 1-channel inverse rolloff: 1\] 2 out of 2 assertions were failed.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-distance-clamping.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-distance-clamping.html.ini
deleted file mode 100644
index 590a0e116bd..00000000000
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/panner-distance-clamping.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[panner-distance-clamping.html]
-  expected: ERROR
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 5283e0ae9cb..03ca02fce8b 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -27080,7 +27080,7 @@
    "testharness"
   ], 
   "mozilla/interfaces.html": [
-   "8153d67c8cb4e554b05ac884e9898f50508349be", 
+   "95ab0109c82c8e90a3e53a3579b9337e2091e26c",
    "testharness"
   ], 
   "mozilla/interfaces.js": [
diff --git a/tests/wpt/mozilla/tests/mozilla/interfaces.html b/tests/wpt/mozilla/tests/mozilla/interfaces.html
index 8153d67c8cb..95ab0109c82 100644
--- a/tests/wpt/mozilla/tests/mozilla/interfaces.html
+++ b/tests/wpt/mozilla/tests/mozilla/interfaces.html
@@ -30,6 +30,7 @@ test_interfaces([
   "CanvasRenderingContext2D",
   "CanvasPattern",
   "ChannelMergerNode",
+  "ChannelSplitterNode",
   "CharacterData",
   "CloseEvent",
   "CSS",