--- a/dom/media/webaudio/ChannelSplitterNode.cpp
+++ b/dom/media/webaudio/ChannelSplitterNode.cpp
@@ -48,17 +48,17 @@ public:
   {
     return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
   }
 };
 
 ChannelSplitterNode::ChannelSplitterNode(AudioContext* aContext,
                                          uint16_t aOutputCount)
   : AudioNode(aContext,
-              6,
+              aOutputCount,
               ChannelCountMode::Explicit,
               ChannelInterpretation::Discrete)
   , mOutputCount(aOutputCount)
 {
   mStream = AudioNodeStream::Create(aContext,
                                     new ChannelSplitterNodeEngine(this),
                                     AudioNodeStream::NO_STREAM_FLAGS,
                                     aContext->Graph());