Microphone monitoring in Appcelerator Titanium using the AVAudioRecorder API

app.js

'use strict';

var ButtonTitle = {
    START: 'Start Microphone Monitoring',
    STOP: 'Stop Microphone Monitoring'
};

Object.freeze(ButtonTitle);

var started = false;
var interval = null;

var win = Ti.UI.createWindow({
    backgroundColor: '#fff'
});

var btn = Ti.UI.createButton({
    title: ButtonTitle.START
});

btn.addEventListener('click', function buttonHandler() {
    if (!started) {
        Ti.Media.startMicrophoneMonitor();
        interval = setInterval(microphoneInterval, 1000);
        started = true;
        btn.title = ButtonTitle.STOP;
    } else {
        Ti.Media.stopMicrophoneMonitor();
        clearInterval(interval);
        started = false;
        btn.title = ButtonTitle.START;
    }
});

function microphoneInterval() {
    Ti.API.info('Average mic-power: ' + Ti.Media.averageMicrophonePower);
    Ti.API.info('Peak mic-power: ' + Ti.Media.peakMicrophonePower);
}

win.add(btn);
win.open();