RangeError with float: true

[belm0]

buffer.js:1396
    binding.writeFloatLE(this, val, offset);
            ^

RangeError: out of range index
    at Buffer.writeFloatLE (buffer.js:1396:13)
    at PCMBufferWriter.pcm32f (/Users/john/tmp/web-audio-engine/demo/node_modules/web-audio-engine/lib/utils/PCMBufferWriter.js:42:20)
    at Object.encode (/Users/john/tmp/web-audio-engine/demo/node_modules/web-audio-engine/lib/utils/PCMEncoder.js:41:29)
    at Immediate.renderingProcess [as _onImmediate] (/Users/john/tmp/web-audio-engine/demo/node_modules/web-audio-engine/lib/context/StreamAudioContext.js:161:34)
    at runCallback (timers.js:789:20)
    at tryOnImmediate (timers.js:751:5)
    at processImmediate [as _immediateCallback] (timers.js:722:5)

sample program

const useFloat = true;

const Speaker = require("speaker");
const AudioContext = new require("web-audio-engine").StreamAudioContext;
const context = new AudioContext({
  float: useFloat,
});
context.pipe(new Speaker({
  float: useFloat,
}));
context.resume();

var keypress = require('keypress');
keypress(process.stdin);

function ticktack(e) {
  var t0 = context.currentTime;
  var t1 = t0 + e.args.duration;
  var osc = context.createOscillator();
  var amp = context.createGain();

  osc.frequency.value = e.args.frequency;
  osc.start(t0);
  osc.stop(t1);
  osc.connect(amp);

  amp.gain.setValueAtTime(0.5 * e.args.amp, t0);
  amp.gain.exponentialRampToValueAtTime(1e-6, t1);
  amp.connect(context.destination);
}

process.stdin.on('keypress', function (ch, key) {
  ticktack({args: { frequency: 880, amp: 1.0, duration: 1.00 }});
  if (key && key.ctrl && key.name == 'c') {
    process.exit(0);
  }
});
process.stdin.setRawMode(true);
process.stdin.resume();

[mohayonao]

Thanks!