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diff --git a/devtools/client/webaudioeditor/test/doc_automation.html b/devtools/client/webaudioeditor/test/doc_automation.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";
+
+ let ctx = new AudioContext();
+ let osc = ctx.createOscillator();
+ let gain = ctx.createGain();
+ gain.gain.value = 0;
+ osc.frequency.setValueAtTime(0.2, 0);
+ osc.frequency.linearRampToValueAtTime(1, 0.3);
+ osc.frequency.exponentialRampToValueAtTime(0.75, 0.6);
+ osc.frequency.setValueCurveAtTime(new Float32Array([-1, 0, 1]), 0.7, 0.3);
+ osc.connect(gain);
+ gain.connect(ctx.destination);
+ osc.start(0);
+ </script>
+ </body>
+
+</html>