How to play audio from Buffer

@beck24 wrote:

I'm building an integration with AWS Lex and the API returns an audio response in the form of a Buffer

Screen Shot 2017-05-30 at 10.50.08 AM.png982x124 17.4 KB

I've been spinning my wheels failing to find a way to play the audio response. Anyone have any idea?
Here's what I've got so far. It's not throwing any errors, but it's not playing any audio.

               var AudioContext = window.AudioContext // Default
                || window.webkitAudioContext // Safari and old versions of Chrome
                || false;

                let context = new AudioContext();
                let playSound = context.createBufferSource();

                // transform the aws Buffer response to an ArrayBuffer
                let ab = new ArrayBuffer(awsres.audioStream.length);
                let view = new Uint8Array(ab);
                for (let i = 0; i < awsres.audioStream.length; ++i) {
                  view[i] = awsres.audioStream[i];
                }

                context.decodeAudioData(ab, (buf) => {
                  playSound.buffer = buf;
                });
                playSound.connect(context.destination);
                console.log('playing sound');
                playSound.start(0);

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