AnalyserNode should downmix channels to mono.

third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js

 function writeString(s, a, offset) {
     for (var i = 0; i < s.length; ++i) {
         a[offset + i] = s.charCodeAt(i);
     }
 }
 
 function writeInt16(n, a, offset) {
     n = Math.floor(n);
 
     var b1 = n & 255;
@@ skipping 245 matching lines @@
     var endFrame = timeToSampleFrame(grainOffset + duration, sampleRate);
 
     return endFrame - startFrame;
 }
 
 // True if the number is not an infinity or NaN
 function isValidNumber(x) {
     return !isNaN(x) && (x != Infinity) && (x != -Infinity);
 }
 
-

[hongchan, 2016/03/16 21:51:42]

nit: I put 2 spaces intentionally here, but doesn't really matter.

[Raymond Toy, 2016/03/16 21:58:23]

I didn't mean to change this file. (I originally had my own downmixing function
here, but don't need it anymore.)

[Raymond Toy, 2016/03/18 17:33:04]

Done.

 // |Audit| is a task runner for web audio test. It makes asynchronous web audio
 // testing simple and manageable.
 //
 // EXAMPLE:
 //
 //   var audit = Audit.createTaskRunner();
 //   // Define test routine. Make sure to call done() when reached at the end.
 //   audit.defineTask('foo', function (done) {
 //     var context = new AudioContext();
 //     // do things
@@ skipping 772 matching lines @@
             if (opts.hasOwnProperty('verbose'))
                 _opts.verbose = opts.verbose;
             if (opts.hasOwnProperty('precision'))
                 _opts.precision = opts.precision;
         }
 
         return new ShouldModel(desc, target, _opts);
     };
 
 })();