diff --git a/content/media/webaudio/AudioParam.h b/content/media/webaudio/AudioParam.h
index a9918d9073ec..da826a30c07f 100644
--- a/content/media/webaudio/AudioParam.h
+++ b/content/media/webaudio/AudioParam.h
@@ -64,6 +64,10 @@ public:
   // sure that the callback is called every time that this object gets mutated.
   void SetValue(float aValue)
   {
+    // Optimize away setting the same value on an AudioParam
+    if (HasSimpleValue() && fabsf(GetValue() - aValue) < 1e-7) {
+      return;
+    }
     AudioParamTimeline::SetValue(aValue);
     mCallback(mNode);
   }