Simple Audio API Test

audio.js

(function() {
    var context = new AudioContext();

    // 32000 Hz, 1 second, 200 Hz tone
    // 32000 / 200 = exact 160 cycles
    function playSineWave() {
        var buffer = context.createBuffer(1, 32000, 32000);
        var data = buffer.getChannelData(0);
        for (var i = 0; i < data.length; ++i) {
            data[i] = Math.sin(i / 160 * 2 * Math.PI);
        }

        for (var i = 0; i < 5; ++i) {
            var source = context.createBufferSource();
            source.buffer = buffer;
            source.connect(context.destination);
            source.start(i);
        }
    }

    playSineWave();
})();

You should use context.currentTime, in this example...
3 years late... i know.

You can work with faster integer and use var arrayFloat = Float32Array.from(array, n => n / 32768); to convert in float:)