diff --git a/src/lib/libwebaudio.js b/src/lib/libwebaudio.js
index 3378cc89792d9..bd8755a5e1503 100644
--- a/src/lib/libwebaudio.js
+++ b/src/lib/libwebaudio.js
@@ -318,6 +318,9 @@ var LibraryWebAudio = {
       numberOfInputs: {{{ makeGetValue('options', C_STRUCTS.EmscriptenAudioWorkletNodeCreateOptions.numberOfInputs, 'i32') }}},
       numberOfOutputs: optionsOutputs,
       outputChannelCount: readChannelCountArray({{{ makeGetValue('options', C_STRUCTS.EmscriptenAudioWorkletNodeCreateOptions.outputChannelCounts, 'i32*') }}}, optionsOutputs),
+      channelCount: (function(){ var v = {{{ makeGetValue('options', C_STRUCTS.EmscriptenAudioWorkletNodeCreateOptions.channelCount, 'u32') }}}; return v > 0 ? v : undefined; })(),
+      channelCountMode: (function(){ var v = {{{ makeGetValue('options', C_STRUCTS.EmscriptenAudioWorkletNodeCreateOptions.channelCountMode, 'i32') }}}; var arr = ['max','clamped-max','explicit']; return arr[v] || undefined; })(),
+      channelInterpretation: (function(){ var v = {{{ makeGetValue('options', C_STRUCTS.EmscriptenAudioWorkletNodeCreateOptions.channelInterpretation, 'i32') }}}; var arr = ['speakers','discrete']; return arr[v] || undefined; })(),
       processorOptions: {
         callback,
         userData,
diff --git a/system/include/emscripten/webaudio.h b/system/include/emscripten/webaudio.h
index 07d60e8525a86..122ad1e407c3b 100644
--- a/system/include/emscripten/webaudio.h
+++ b/system/include/emscripten/webaudio.h
@@ -126,6 +126,17 @@ typedef struct AudioParamFrame
 
 typedef bool (*EmscriptenWorkletNodeProcessCallback)(int numInputs, const AudioSampleFrame *inputs, int numOutputs, AudioSampleFrame *outputs, int numParams, const AudioParamFrame *params, void *userData4);
 
+typedef enum {
+    WEBAUDIO_CHANNEL_COUNT_MODE_MAX = 0,
+    WEBAUDIO_CHANNEL_COUNT_MODE_CLAMPED_MAX = 1,
+    WEBAUDIO_CHANNEL_COUNT_MODE_EXPLICIT = 2
+} WEBAUDIO_CHANNEL_COUNT_MODE;
+
+typedef enum {
+    WEBAUDIO_CHANNEL_INTERPRETATION_SPEAKERS = 0,
+    WEBAUDIO_CHANNEL_INTERPRETATION_DISCRETE = 1
+} WEBAUDIO_CHANNEL_INTERPRETATION;
+
 typedef struct EmscriptenAudioWorkletNodeCreateOptions
 {
 	// How many audio nodes does this node take inputs from? Default=1
@@ -134,6 +145,10 @@ typedef struct EmscriptenAudioWorkletNodeCreateOptions
 	int numberOfOutputs;
 	// For each output, specifies the number of audio channels (1=mono/2=stereo/etc.) for that output. Default=an array of ones for each output channel.
 	int *outputChannelCounts;
+	unsigned long channelCount;
+	WEBAUDIO_CHANNEL_COUNT_MODE channelCountMode;
+	WEBAUDIO_CHANNEL_INTERPRETATION channelInterpretation;
+
 } EmscriptenAudioWorkletNodeCreateOptions;
 
 // Instantiates the given AudioWorkletProcessor as an AudioWorkletNode, which continuously calls the specified processCallback() function on the browser's audio thread to perform audio processing.