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+<!DOCTYPE html>
+<title>Test effect of AnalyserNode on GainNode output</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+promise_test(function() {
+ // fftSize <= bufferSize so that the time domain data is full of input after
+ // processing the buffer.
+ const fftSize = 32;
+ const bufferSize = 128;
+
+ var context = new OfflineAudioContext(1, bufferSize, 48000);
+
+ var analyser1 = context.createAnalyser();
+ analyser1.fftSize = fftSize;
+ analyser1.connect(context.destination);
+ var analyser2 = context.createAnalyser();
+ analyser2.fftSize = fftSize;
+
+ var gain = context.createGain();
+ gain.gain.value = 2.0;
+ gain.connect(analyser1);
+ gain.connect(analyser2);
+
+ // Create a DC input to make getFloatTimeDomainData() output consistent at
+ // any time.
+ var buffer = context.createBuffer(1, 1, context.sampleRate);
+ buffer.getChannelData(0)[0] = 1.0 / gain.gain.value;
+ var source = context.createBufferSource();
+ source.buffer = buffer;
+ source.loop = true;
+ source.connect(gain);
+ source.start();
+
+ return context.startRendering().
+ then(function(buffer) {
+ assert_equals(buffer.getChannelData(0)[0], 1.0,
+ "analyser1 output");
+
+ var data = new Float32Array(1);
+ analyser1.getFloatTimeDomainData(data);
+ assert_equals(data[0], 1.0, "analyser1 time domain data");
+ analyser2.getFloatTimeDomainData(data);
+ assert_equals(data[0], 1.0, "analyser2 time domain data");
+ });
+});
+</script>