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diff --git a/devtools/client/webaudioeditor/test/doc_complex-context.html b/devtools/client/webaudioeditor/test/doc_complex-context.html
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+<!-- Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/ -->
+<!doctype html>
+
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Web Audio Editor test page</title>
+  </head>
+
+  <body>
+
+    <script type="text/javascript;version=1.8">
+      "use strict";
+
+/*
+         ↱   proc
+  osc    →   gain   →
+  osc    →   gain   →  destination
+  buffer →↳  filter →
+*/
+      let ctx = new AudioContext();
+      let osc1 = ctx.createOscillator();
+      let gain1 = ctx.createGain();
+      let proc = ctx.createScriptProcessor();
+      osc1.connect(gain1);
+      osc1.connect(proc);
+      gain1.connect(ctx.destination);
+
+      let osc2 = ctx.createOscillator();
+      let gain2 = ctx.createGain();
+      osc2.connect(gain2);
+      gain2.connect(ctx.destination);
+
+      let buf = ctx.createBufferSource();
+      let filter = ctx.createBiquadFilter();
+      buf.connect(filter);
+      osc2.connect(filter);
+      filter.connect(ctx.destination);
+
+    </script>
+  </body>
+
+</html>