sound.js

var globalVolume = 50;
var globalScalePitch;
var globalBank;
//init volume at 50%
Howler.volume (globalVolume*.01);

function Sound() {

}

var soundBank = [];
	// the second number is the number of sound files available
	soundBank[0] = ["celesta", 22];
	soundBank[1] = ["planet", 33];
	soundBank[2] = ["wikki", 13];

function zeroPad(num, places) {
	var zero = places - num.toString().length + 1;
	return Array(+(zero > 0 && zero)).join("0") + num;
}
	
Sound.loadup = function(){
	var newSound;
	var istring;

	// sound0 = celesta
	sound0 = new Array(); 

    // sound1 = planet
	sound1 = new Array(); 

    // sound2 = celestaB
	sound2 = new Array(); 

	// String swells0, for blocks
	swells0 = new Array();
	
	// String swells1, for blocks
	swells1 = new Array();

    // String swells2, for blocks
	swells2 = new Array();
	
	// These variables are populated (and their sounds loaded) by the Sound.change function below.
}



Sound.init = function() {


	// Initialize sound toggle button
	$("#volumeControl").click(function() {
		if (!globalMute) {
			globalMute = true;
			Howler.mute();
			$("#volumeControl").css("background-position", "0 0");
		} else {
			globalMute = false;
			Howler.unmute();
			$("#volumeControl").css("background-position", "0 -46px");
		}
	});
    
	// Initialize sound slider
	$("#volumeSlider").noUiSlider({
		range : [0, 100],
		start : 50,
		handles : 1,
		step : 1,
		orientation : "vertical",
		slide : function() {
			globalVolume = 100 - $(this).val();
			Howler.volume (globalVolume*.01);
		}
	});
	
	globalScalePitch = $("#scalePitchCheckBox").attr("checked");
	Sound.change(0);
}

Sound.change = function(instrument_number) {
    var musicianString = "Donate to instrument creator: ";
	// INSTRUMENT 0
	if (instrument_number == 0 ) {
		// Load sound and swells if not already loaded
		if (sound0.length == 0) {
			for (var i = 1; i <= 22; i++) {
				istring = zeroPad(i, 3);
				newSound = new Howl({
						urls: ["sounds/celesta/" + "celesta" + istring + ".ogg",
							   "sounds/celesta/" + "celesta" + istring + ".mp3"],
						autoplay: false
				});
				sound0.push(newSound);
			}
		}
		if (swells0.length == 0) {
			for (var i = 1; i <= 3; i++) {
				newSound = new Howl({
					urls: ["sounds/swells0/swell" + i +".ogg",
							"sounds/swells0/swell" + i +".mp3"],
					autoplay: false
				});
				swells0.push(newSound);
			}
		}
		currentSound = sound0;
		currentSwells = swells0;
		$('#musicianDonation').text("");
	}
	// INSTRUMENT 1
	else if (instrument_number == 1) {
	    // Load sound and swells if not already loaded
		if (sound1.length == 0) {
			for (var i = 1; i <= 33; i++) {
				istring = zeroPad(i, 3);
				newSound = new Howl({
						urls: ["sounds/planet/" + "planet" + istring + ".ogg",
							   "sounds/planet/" + "planet" + istring + ".mp3"],
						autoplay: false
				});
				sound1.push(newSound);
			}
		}
        if (swells1.length == 0) {
			for (var i = 1; i <= 3; i++) {
				newSound = new Howl({
					urls: ["sounds/swells1/planetswell" + i +".ogg",
							"sounds/swells1/planetswell" + i +".mp3"],
					autoplay: false
				});
				swells1.push(newSound);
			}
		}
		currentSound = sound1;
		currentSwells = swells1;
		SOUND_DONATION_ADDRESS = "144b31mmaWQVDQFiUPo6HEzxc2Dm83WXrW";
		$('#musicianDonation').html(musicianString + "<span>" + SOUND_DONATION_ADDRESS + "</span>");
	}
    // INSTRUMENT 2
	else if (instrument_number == 2) {
		// Load sound and swells if not already loaded
		if (sound2.length == 0) {
			for (var i = 1; i <= 13; i++) {
				istring = zeroPad(i, 3);
				newSound = new Howl({
						urls: ["sounds/wikki/" + "wikki" + istring + ".ogg",
							   "sounds/wikki/" + "wikki" + istring + ".mp3"],
						autoplay: false
				});
				sound2.push(newSound);
			}
		}
		if (swells2.length == 0) {
			for (var i = 1; i <= 3; i++) {
				newSound = new Howl({
					urls: ["sounds/swells2/wikkiswell" + i +".ogg",
							"sounds/swells2/wikkiswell" + i +".mp3"],
					autoplay: false
				});
				swells2.push(newSound);
			}
		}
	    currentSound = sound2;
		currentSwells = swells2;
		SOUND_DONATION_ADDRESS = "1JFaYRGkDmhpSTbFKwqDWKr2ncvvrgYEAV";
		$('#musicianDonation').html(musicianString + "<span>" + SOUND_DONATION_ADDRESS + "</span>");
		}
}

var currentNotes = 0;
var noteTimeout = 500;

Sound.playRandomAtVolume = function(volume) {
	if (globalMute)
		return;
		
	var randomPitch = Math.floor(Math.random() * 100);
	this.playPitchAtVolume(volume, randomPitch);
}

Sound.playPitchAtVolume = function(volume, pitch) {
	if (globalMute)
		return;
	// Find the index corresponding to the requested pitch
	var index = Math.floor(pitch / 100.0 * currentSound.length);
	//console.log("Pitch: " + pitch);
	
	// Here we fuzz the index a bit to prevent the same sound
	// from being heard over and over again, which gets annoying
	var fuzz = Math.floor(Math.random() * 4) - 2;
	index += fuzz
	index = Math.min(currentSound.length - 1, index);
	index = Math.max(0, index);
	
	//console.log("Fuzz: " + fuzz);
	//console.log("Index: " + index);
	

	//var readyState = currentSound[index].get("readyState");
	if (currentNotes < 5) {
                currentSound[index].volume(volume);
		currentSound[index].play();
		currentNotes++;
		setTimeout(function() {
			currentNotes--;
		}, noteTimeout);
	}
}

var lastBlockSound = -1;
Sound.playRandomSwell = function() {
	if (globalMute)
		return;

	var randomIndex;
	do {
		randomIndex = Math.floor(Math.random() * currentSwells.length);
	} while (randomIndex == lastBlockSound);

	lastBlockSound = randomIndex;

	//var readyState = this.swells[randomIndex].get("readyState");
	//if (readyState >= 2)
	currentSwells[randomIndex].play();
}