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\nloaded\n\t * and total properties.\n\t * @protected\n\t */\n\tp._sendProgress = function (value) {\n\t\tif (this._isCanceled()) { return; }\n\t\tvar event = null;\n\t\tif (typeof (value) == \"number\") {\n\t\t\tthis.progress = value;\n\t\t\tevent = new createjs.ProgressEvent(this.progress);\n\t\t} else {\n\t\t\tevent = value;\n\t\t\tthis.progress = value.loaded / value.total;\n\t\t\tevent.progress = this.progress;\n\t\t\tif (isNaN(this.progress) || this.progress == Infinity) { this.progress = 0; }\n\t\t}\n\t\tthis.hasEventListener(\"progress\") && this.dispatchEvent(event);\n\t};\n\n\t/**\n\t * Dispatch a complete {{#crossLink \"Event\"}}{{/crossLink}}. Please see the {{#crossLink \"AbstractLoader/complete:event\"}}{{/crossLink}} event\n\t * @method _sendComplete\n\t * @protected\n\t */\n\tp._sendComplete = function () {\n\t\tif (this._isCanceled()) { return; }\n\n\t\tthis.loaded = true;\n\n\t\tvar event = new createjs.Event(\"complete\");\n\t\tevent.rawResult = this._rawResult;\n\n\t\tif (this._result != null) {\n\t\t\tevent.result = this._result;\n\t\t}\n\n\t\tthis.dispatchEvent(event);\n\t};\n\n\t/**\n\t * Dispatch an error {{#crossLink \"Event\"}}{{/crossLink}}. Please see the {{#crossLink \"AbstractLoader/error:event\"}}{{/crossLink}}\n\t * event for details on the event payload.\n\t * @method _sendError\n\t * @param {ErrorEvent} event The event object containing specific error properties.\n\t * @protected\n\t */\n\tp._sendError = function (event) {\n\t\tif (this._isCanceled() || !this.hasEventListener(\"error\")) { return; }\n\t\tif (event == null) {\n\t\t\tevent = new createjs.ErrorEvent(\"PRELOAD_ERROR_EMPTY\"); // TODO: Populate error\n\t\t}\n\t\tthis.dispatchEvent(event);\n\t};\n\n\t/**\n\t * Determine if the load has been canceled. This is important to ensure that method calls or asynchronous events\n\t * do not cause issues after the queue has been cleaned up.\n\t * @method _isCanceled\n\t * @return {Boolean} If the loader has been canceled.\n\t * @protected\n\t */\n\tp._isCanceled = function () {\n\t\tif (window.createjs == null || this.canceled) {\n\t\t\treturn true;\n\t\t}\n\t\treturn false;\n\t};\n\n\t/**\n\t * A custom result formatter function, which is called just before a request dispatches its complete event. Most\n\t * loader types already have an internal formatter, but this can be user-overridden for custom formatting. The\n\t * formatted result will be available on Loaders using {{#crossLink \"getResult\"}}{{/crossLink}}, and passing `true`.\n\t * @property resultFormatter\n\t * @type Function\n\t * @return {Object} The formatted result\n\t * @since 0.6.0\n\t */\n\tp.resultFormatter = null;\n\n\t/**\n\t * Handle events from internal requests. By default, loaders will handle, and redispatch the necessary events, but\n\t * this method can be overridden for custom behaviours.\n\t * @method handleEvent\n\t * @param {Event} event The event that the internal request dispatches.\n\t * @protected\n\t * @since 0.6.0\n\t */\n\tp.handleEvent = function (event) {\n\t\tswitch (event.type) {\n\t\t\tcase \"complete\":\n\t\t\t\tthis._rawResult = event.target._response;\n\t\t\t\tvar result = this.resultFormatter && this.resultFormatter(this);\n\t\t\t\t// The resultFormatter is asynchronous\n\t\t\t\tif (result instanceof Function) {\n\t\t\t\t\tresult.call(this,\n\t\t\t\t\t\tcreatejs.proxy(this._resultFormatSuccess, this),\n\t\t\t\t\t\tcreatejs.proxy(this._resultFormatFailed, this)\n\t\t\t\t\t);\n\t\t\t\t\t// The result formatter is synchronous\n\t\t\t\t} else {\n\t\t\t\t\tthis._result = result || this._rawResult;\n\t\t\t\t\tthis._sendComplete();\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t\tcase \"progress\":\n\t\t\t\tthis._sendProgress(event);\n\t\t\t\tbreak;\n\t\t\tcase \"error\":\n\t\t\t\tthis._sendError(event);\n\t\t\t\tbreak;\n\t\t\tcase \"loadstart\":\n\t\t\t\tthis._sendLoadStart();\n\t\t\t\tbreak;\n\t\t\tcase \"abort\":\n\t\t\tcase \"timeout\":\n\t\t\t\tif (!this._isCanceled()) {\n\t\t\t\t\tthis.dispatchEvent(new createjs.ErrorEvent(\"PRELOAD_\" + event.type.toUpperCase() + \"_ERROR\"));\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t}\n\t};\n\n\t/**\n\t * The \"success\" callback passed to {{#crossLink \"AbstractLoader/resultFormatter\"}}{{/crossLink}} asynchronous\n\t * functions.\n\t * @method _resultFormatSuccess\n\t * @param {Object} result The formatted result\n\t * @private\n\t */\n\tp._resultFormatSuccess = function (result) {\n\t\tthis._result = result;\n\t\tthis._sendComplete();\n\t};\n\n\t/**\n\t * The \"error\" callback passed to {{#crossLink \"AbstractLoader/resultFormatter\"}}{{/crossLink}} asynchronous\n\t * functions.\n\t * @method _resultFormatSuccess\n\t * @param {Object} error The error event\n\t * @private\n\t */\n\tp._resultFormatFailed = function (event) {\n\t\tthis._sendError(event);\n\t};\n\n\t/**\n\t * @method toString\n\t * @return {String} a string representation of the instance.\n\t */\n\tp.toString = function () {\n\t\treturn \"[PreloadJS AbstractLoader]\";\n\t};\n\n\tcreatejs.AbstractLoader = createjs.promote(AbstractLoader, \"EventDispatcher\");\n\n}());\n\n//##############################################################################\n// AbstractMediaLoader.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t// constructor\n\t/**\n\t * The AbstractMediaLoader is a base class that handles some of the shared methods and properties of loaders that\n\t * handle HTML media elements, such as Video and Audio.\n\t * @class AbstractMediaLoader\n\t * @param {LoadItem|Object} loadItem\n\t * @param {Boolean} preferXHR\n\t * @param {String} type The type of media to load. Usually \"video\" or \"audio\".\n\t * @extends AbstractLoader\n\t * @constructor\n\t */\n\tfunction AbstractMediaLoader(loadItem, preferXHR, type) {\n\t\tthis.AbstractLoader_constructor(loadItem, preferXHR, type);\n\n\t\t// public properties\n\t\tthis.resultFormatter = this._formatResult;\n\n\t\t// protected properties\n\t\tthis._tagSrcAttribute = \"src\";\n\n\t\tthis.on(\"initialize\", this._updateXHR, this);\n\t}\n\n\tvar p = createjs.extend(AbstractMediaLoader, createjs.AbstractLoader);\n\n\t// static properties\n\t// public methods\n\tp.load = function () {\n\t\t// TagRequest will handle most of this, but Sound / Video need a few custom properties, so just handle them here.\n\t\tif (!this._tag) {\n\t\t\tthis._tag = this._createTag(this._item.src);\n\t\t}\n\n\t\tthis._tag.preload = \"auto\";\n\t\tthis._tag.load();\n\n\t\tthis.AbstractLoader_load();\n\t};\n\n\t// protected methods\n\t/**\n\t * Creates a new tag for loading if it doesn't exist yet.\n\t * @method _createTag\n\t * @private\n\t */\n\tp._createTag = function () { };\n\n\n\tp._createRequest = function () {\n\t\tif (!this._preferXHR) {\n\t\t\tthis._request = new createjs.MediaTagRequest(this._item, this._tag || this._createTag(), this._tagSrcAttribute);\n\t\t} else {\n\t\t\tthis._request = new createjs.XHRRequest(this._item);\n\t\t}\n\t};\n\n\t// protected methods\n\t/**\n\t * Before the item loads, set its mimeType and responseType.\n\t * @property _updateXHR\n\t * @param {Event} event\n\t * @private\n\t */\n\tp._updateXHR = function (event) {\n\t\t// Only exists for XHR\n\t\tif (event.loader.setResponseType) {\n\t\t\tevent.loader.setResponseType(\"blob\");\n\t\t}\n\t};\n\n\t/**\n\t * The result formatter for media files.\n\t * @method _formatResult\n\t * @param {AbstractLoader} loader\n\t * @returns {HTMLVideoElement|HTMLAudioElement}\n\t * @private\n\t */\n\tp._formatResult = function (loader) {\n\t\tthis._tag.removeEventListener && this._tag.removeEventListener(\"canplaythrough\", this._loadedHandler);\n\t\tthis._tag.onstalled = null;\n\t\tif (this._preferXHR) {\n\t\t\tvar URL = window.URL || window.webkitURL;\n\t\t\tvar result = loader.getResult(true);\n\n\t\t\tloader.getTag().src = URL.createObjectURL(result);\n\t\t}\n\t\treturn loader.getTag();\n\t};\n\n\tcreatejs.AbstractMediaLoader = createjs.promote(AbstractMediaLoader, \"AbstractLoader\");\n\n}());\n\n//##############################################################################\n// AbstractRequest.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t/**\n\t * A base class for actual data requests, such as {{#crossLink \"XHRRequest\"}}{{/crossLink}}, {{#crossLink \"TagRequest\"}}{{/crossLink}},\n\t * and {{#crossLink \"MediaRequest\"}}{{/crossLink}}. PreloadJS loaders will typically use a data loader under the\n\t * hood to get data.\n\t * @class AbstractRequest\n\t * @param {LoadItem} item\n\t * @constructor\n\t */\n\tvar AbstractRequest = function (item) {\n\t\tthis._item = item;\n\t};\n\n\tvar p = createjs.extend(AbstractRequest, createjs.EventDispatcher);\n\n\t// public methods\n\t/**\n\t * Begin a load.\n\t * @method load\n\t */\n\tp.load = function () { };\n\n\t/**\n\t * Clean up a request.\n\t * @method destroy\n\t */\n\tp.destroy = function () { };\n\n\t/**\n\t * Cancel an in-progress request.\n\t * @method cancel\n\t */\n\tp.cancel = function () { };\n\n\tcreatejs.AbstractRequest = createjs.promote(AbstractRequest, \"EventDispatcher\");\n\n}());\n\n//##############################################################################\n// TagRequest.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t// constructor\n\t/**\n\t * An {{#crossLink \"AbstractRequest\"}}{{/crossLink}} that loads HTML tags, such as images and scripts.\n\t * @class TagRequest\n\t * @param {LoadItem} loadItem\n\t * @param {HTMLElement} tag\n\t * @param {String} srcAttribute The tag attribute that specifies the source, such as \"src\", \"href\", etc.\n\t */\n\tfunction TagRequest(loadItem, tag, srcAttribute) {\n\t\tthis.AbstractRequest_constructor(loadItem);\n\n\t\t// protected properties\n\t\t/**\n\t\t * The HTML tag instance that is used to load.\n\t\t * @property _tag\n\t\t * @type {HTMLElement}\n\t\t * @protected\n\t\t */\n\t\tthis._tag = tag;\n\n\t\t/**\n\t\t * The tag attribute that specifies the source, such as \"src\", \"href\", etc.\n\t\t * @property _tagSrcAttribute\n\t\t * @type {String}\n\t\t * @protected\n\t\t */\n\t\tthis._tagSrcAttribute = srcAttribute;\n\n\t\t/**\n\t\t * A method closure used for handling the tag load event.\n\t\t * @property _loadedHandler\n\t\t * @type {Function}\n\t\t * @private\n\t\t */\n\t\tthis._loadedHandler = createjs.proxy(this._handleTagComplete, this);\n\n\t\t/**\n\t\t * Determines if the element was added to the DOM automatically by PreloadJS, so it can be cleaned up after.\n\t\t * @property _addedToDOM\n\t\t * @type {Boolean}\n\t\t * @private\n\t\t */\n\t\tthis._addedToDOM = false;\n\n\t}\n\n\tvar p = createjs.extend(TagRequest, createjs.AbstractRequest);\n\n\t// public methods\n\tp.load = function () {\n\t\tthis._tag.onload = createjs.proxy(this._handleTagComplete, this);\n\t\tthis._tag.onreadystatechange = createjs.proxy(this._handleReadyStateChange, this);\n\t\tthis._tag.onerror = createjs.proxy(this._handleError, this);\n\n\t\tvar evt = new createjs.Event(\"initialize\");\n\t\tevt.loader = this._tag;\n\n\t\tthis.dispatchEvent(evt);\n\n\t\tthis._loadTimeout = setTimeout(createjs.proxy(this._handleTimeout, this), this._item.loadTimeout);\n\n\t\tthis._tag[this._tagSrcAttribute] = this._item.src;\n\n\t\t// wdg:: Append the tag AFTER setting the src, or SVG loading on iOS will fail.\n\t\tif (this._tag.parentNode == null) {\n\t\t\tcreatejs.DomUtils.appendToBody(this._tag);\n\t\t\tthis._addedToDOM = true;\n\t\t}\n\t};\n\n\tp.destroy = function () {\n\t\tthis._clean();\n\t\tthis._tag = null;\n\n\t\tthis.AbstractRequest_destroy();\n\t};\n\n\t// private methods\n\t/**\n\t * Handle the readyStateChange event from a tag. We need this in place of the `onload` callback (mainly SCRIPT\n\t * and LINK tags), but other cases may exist.\n\t * @method _handleReadyStateChange\n\t * @private\n\t */\n\tp._handleReadyStateChange = function () {\n\t\tclearTimeout(this._loadTimeout);\n\t\t// This is strictly for tags in browsers that do not support onload.\n\t\tvar tag = this._tag;\n\n\t\t// Complete is for old IE support.\n\t\tif (tag.readyState == \"loaded\" || tag.readyState == \"complete\") {\n\t\t\tthis._handleTagComplete();\n\t\t}\n\t};\n\n\t/**\n\t * Handle any error events from the tag.\n\t * @method _handleError\n\t * @protected\n\t */\n\tp._handleError = function () {\n\t\tthis._clean();\n\t\tthis.dispatchEvent(\"error\");\n\t};\n\n\t/**\n\t * Handle the tag's onload callback.\n\t * @method _handleTagComplete\n\t * @private\n\t */\n\tp._handleTagComplete = function () {\n\t\tthis._rawResult = this._tag;\n\t\tthis._result = this.resultFormatter && this.resultFormatter(this) || this._rawResult;\n\n\t\tthis._clean();\n\n\t\tthis.dispatchEvent(\"complete\");\n\t};\n\n\t/**\n\t * The tag request has not loaded within the time specified in loadTimeout.\n\t * @method _handleError\n\t * @param {Object} event The XHR error event.\n\t * @private\n\t */\n\tp._handleTimeout = function () {\n\t\tthis._clean();\n\t\tthis.dispatchEvent(new createjs.Event(\"timeout\"));\n\t};\n\n\t/**\n\t * Remove event listeners, but don't destroy the request object\n\t * @method _clean\n\t * @private\n\t */\n\tp._clean = function () {\n\t\tthis._tag.onload = null;\n\t\tthis._tag.onreadystatechange = null;\n\t\tthis._tag.onerror = null;\n\t\tif (this._addedToDOM && this._tag.parentNode != null) {\n\t\t\tthis._tag.parentNode.removeChild(this._tag);\n\t\t}\n\t\tclearTimeout(this._loadTimeout);\n\t};\n\n\t/**\n\t * Handle a stalled audio event. The main place this happens is with HTMLAudio in Chrome when playing back audio\n\t * that is already in a load, but not complete.\n\t * @method _handleStalled\n\t * @private\n\t */\n\tp._handleStalled = function () {\n\t\t//Ignore, let the timeout take care of it. Sometimes its not really stopped.\n\t};\n\n\tcreatejs.TagRequest = createjs.promote(TagRequest, \"AbstractRequest\");\n\n}());\n\n//##############################################################################\n// MediaTagRequest.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t// constructor\n\t/**\n\t * An {{#crossLink \"TagRequest\"}}{{/crossLink}} that loads HTML tags for video and audio.\n\t * @class MediaTagRequest\n\t * @param {LoadItem} loadItem\n\t * @param {HTMLAudioElement|HTMLVideoElement} tag\n\t * @param {String} srcAttribute The tag attribute that specifies the source, such as \"src\", \"href\", etc.\n\t * @constructor\n\t */\n\tfunction MediaTagRequest(loadItem, tag, srcAttribute) {\n\t\tthis.AbstractRequest_constructor(loadItem);\n\n\t\t// protected properties\n\t\tthis._tag = tag;\n\t\tthis._tagSrcAttribute = srcAttribute;\n\t\tthis._loadedHandler = createjs.proxy(this._handleTagComplete, this);\n\t}\n\n\tvar p = createjs.extend(MediaTagRequest, createjs.TagRequest);\n\tvar s = MediaTagRequest;\n\n\t// public methods\n\tp.load = function () {\n\t\tvar sc = createjs.proxy(this._handleStalled, this);\n\t\tthis._stalledCallback = sc;\n\n\t\tvar pc = createjs.proxy(this._handleProgress, this);\n\t\tthis._handleProgress = pc;\n\n\t\tthis._tag.addEventListener(\"stalled\", sc);\n\t\tthis._tag.addEventListener(\"progress\", pc);\n\n\t\t// This will tell us when audio is buffered enough to play through, but not when its loaded.\n\t\t// The tag doesn't keep loading in Chrome once enough has buffered, and we have decided that behaviour is sufficient.\n\t\tthis._tag.addEventListener && this._tag.addEventListener(\"canplaythrough\", this._loadedHandler, false); // canplaythrough callback doesn't work in Chrome, so we use an event.\n\n\t\tthis.TagRequest_load();\n\t};\n\n\t// private methods\n\tp._handleReadyStateChange = function () {\n\t\tclearTimeout(this._loadTimeout);\n\t\t// This is strictly for tags in browsers that do not support onload.\n\t\tvar tag = this._tag;\n\n\t\t// Complete is for old IE support.\n\t\tif (tag.readyState == \"loaded\" || tag.readyState == \"complete\") {\n\t\t\tthis._handleTagComplete();\n\t\t}\n\t};\n\n\tp._handleStalled = function () {\n\t\t//Ignore, let the timeout take care of it. Sometimes its not really stopped.\n\t};\n\n\t/**\n\t * An XHR request has reported progress.\n\t * @method _handleProgress\n\t * @param {Object} event The XHR progress event.\n\t * @private\n\t */\n\tp._handleProgress = function (event) {\n\t\tif (!event || event.loaded > 0 && event.total == 0) {\n\t\t\treturn; // Sometimes we get no \"total\", so just ignore the progress event.\n\t\t}\n\n\t\tvar newEvent = new createjs.ProgressEvent(event.loaded, event.total);\n\t\tthis.dispatchEvent(newEvent);\n\t};\n\n\t// protected methods\n\tp._clean = function () {\n\t\tthis._tag.removeEventListener && this._tag.removeEventListener(\"canplaythrough\", this._loadedHandler);\n\t\tthis._tag.removeEventListener(\"stalled\", this._stalledCallback);\n\t\tthis._tag.removeEventListener(\"progress\", this._progressCallback);\n\n\t\tthis.TagRequest__clean();\n\t};\n\n\tcreatejs.MediaTagRequest = createjs.promote(MediaTagRequest, \"TagRequest\");\n\n}());\n\n//##############################################################################\n// XHRRequest.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t// constructor\n\t/**\n\t * A preloader that loads items using XHR requests, usually XMLHttpRequest. However XDomainRequests will be used\n\t * for cross-domain requests if possible, and older versions of IE fall back on to ActiveX objects when necessary.\n\t * XHR requests load the content as text or binary data, provide progress and consistent completion events, and\n\t * can be canceled during load. Note that XHR is not supported in IE 6 or earlier, and is not recommended for\n\t * cross-domain loading.\n\t * @class XHRRequest\n\t * @constructor\n\t * @param {Object} item The object that defines the file to load. Please see the {{#crossLink \"LoadQueue/loadFile\"}}{{/crossLink}}\n\t * for an overview of supported file properties.\n\t * @extends AbstractLoader\n\t */\n\tfunction XHRRequest(item) {\n\t\tthis.AbstractRequest_constructor(item);\n\n\t\t// protected properties\n\t\t/**\n\t\t * A reference to the XHR request used to load the content.\n\t\t * @property _request\n\t\t * @type {XMLHttpRequest | XDomainRequest | ActiveX.XMLHTTP}\n\t\t * @private\n\t\t */\n\t\tthis._request = null;\n\n\t\t/**\n\t\t * A manual load timeout that is used for browsers that do not support the onTimeout event on XHR (XHR level 1,\n\t\t * typically IE9).\n\t\t * @property _loadTimeout\n\t\t * @type {Number}\n\t\t * @private\n\t\t */\n\t\tthis._loadTimeout = null;\n\n\t\t/**\n\t\t * The browser's XHR (XMLHTTPRequest) version. Supported versions are 1 and 2. There is no official way to detect\n\t\t * the version, so we use capabilities to make a best guess.\n\t\t * @property _xhrLevel\n\t\t * @type {Number}\n\t\t * @default 1\n\t\t * @private\n\t\t */\n\t\tthis._xhrLevel = 1;\n\n\t\t/**\n\t\t * The response of a loaded file. This is set because it is expensive to look up constantly. This property will be\n\t\t * null until the file is loaded.\n\t\t * @property _response\n\t\t * @type {mixed}\n\t\t * @private\n\t\t */\n\t\tthis._response = null;\n\n\t\t/**\n\t\t * The response of the loaded file before it is modified. In most cases, content is converted from raw text to\n\t\t * an HTML tag or a formatted object which is set to the result property, but the developer may still\n\t\t * want to access the raw content as it was loaded.\n\t\t * @property _rawResponse\n\t\t * @type {String|Object}\n\t\t * @private\n\t\t */\n\t\tthis._rawResponse = null;\n\n\t\tthis._canceled = false;\n\n\t\t// Setup our event handlers now.\n\t\tthis._handleLoadStartProxy = createjs.proxy(this._handleLoadStart, this);\n\t\tthis._handleProgressProxy = createjs.proxy(this._handleProgress, this);\n\t\tthis._handleAbortProxy = createjs.proxy(this._handleAbort, this);\n\t\tthis._handleErrorProxy = createjs.proxy(this._handleError, this);\n\t\tthis._handleTimeoutProxy = createjs.proxy(this._handleTimeout, this);\n\t\tthis._handleLoadProxy = createjs.proxy(this._handleLoad, this);\n\t\tthis._handleReadyStateChangeProxy = createjs.proxy(this._handleReadyStateChange, this);\n\n\t\tif (!this._createXHR(item)) {\n\t\t\t//TODO: Throw error?\n\t\t}\n\t}\n\n\tvar p = createjs.extend(XHRRequest, createjs.AbstractRequest);\n\n\t// static properties\n\t/**\n\t * A list of XMLHTTP object IDs to try when building an ActiveX object for XHR requests in earlier versions of IE.\n\t * @property ACTIVEX_VERSIONS\n\t * @type {Array}\n\t * @since 0.4.2\n\t * @private\n\t */\n\tXHRRequest.ACTIVEX_VERSIONS = [\n\t\t\"Msxml2.XMLHTTP.6.0\",\n\t\t\"Msxml2.XMLHTTP.5.0\",\n\t\t\"Msxml2.XMLHTTP.4.0\",\n\t\t\"MSXML2.XMLHTTP.3.0\",\n\t\t\"MSXML2.XMLHTTP\",\n\t\t\"Microsoft.XMLHTTP\"\n\t];\n\n\t// Public methods\n\t/**\n\t * Look up the loaded result.\n\t * @method getResult\n\t * @param {Boolean} [raw=false] Return a raw result instead of a formatted result. This applies to content\n\t * loaded via XHR such as scripts, XML, CSS, and Images. If there is no raw result, the formatted result will be\n\t * returned instead.\n\t * @return {Object} A result object containing the content that was loaded, such as:\n\t * request.readyState == 4. Only the first call to this method will be processed.\n\t *\n\t * Note that This method uses {{#crossLink \"_checkError\"}}{{/crossLink}} to determine if the server has returned an\n\t * error code.\n\t * @method _handleLoad\n\t * @param {Object} event The XHR load event.\n\t * @private\n\t */\n\tp._handleLoad = function (event) {\n\t\tif (this.loaded) {\n\t\t\treturn;\n\t\t}\n\t\tthis.loaded = true;\n\n\t\tvar error = this._checkError();\n\t\tif (error) {\n\t\t\tthis._handleError(error);\n\t\t\treturn;\n\t\t}\n\n\t\tthis._response = this._getResponse();\n\t\t// Convert arraybuffer back to blob\n\t\tif (this._responseType === 'arraybuffer') {\n\t\t\ttry {\n\t\t\t\tthis._response = new Blob([this._response]);\n\t\t\t} catch (e) {\n\t\t\t\t// Fallback to use BlobBuilder if Blob constructor is not supported\n\t\t\t\t// Tested on Android 2.3 ~ 4.2 and iOS5 safari\n\t\t\t\twindow.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;\n\t\t\t\tif (e.name === 'TypeError' && window.BlobBuilder) {\n\t\t\t\t\tvar builder = new BlobBuilder();\n\t\t\t\t\tbuilder.append(this._response);\n\t\t\t\t\tthis._response = builder.getBlob();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tthis._clean();\n\n\t\tthis.dispatchEvent(new createjs.Event(\"complete\"));\n\t};\n\n\t/**\n\t * The XHR request has timed out. This is called by the XHR request directly, or via a setTimeout\n\t * callback.\n\t * @method _handleTimeout\n\t * @param {Object} [event] The XHR timeout event. This is occasionally null when called by the backup setTimeout.\n\t * @private\n\t */\n\tp._handleTimeout = function (event) {\n\t\tthis._clean();\n\t\tthis.dispatchEvent(new createjs.ErrorEvent(\"PRELOAD_TIMEOUT\", null, event));\n\t};\n\n\t// Protected\n\t/**\n\t * Determine if there is an error in the current load.\n\t * Currently this checks the status of the request for problem codes, and not actual response content:\n\t * _response property will remain null.\n\t * @method _getResponse\n\t * @private\n\t */\n\tp._getResponse = function () {\n\t\tif (this._response != null) {\n\t\t\treturn this._response;\n\t\t}\n\n\t\tif (this._request.response != null) {\n\t\t\treturn this._request.response;\n\t\t}\n\n\t\t// Android 2.2 uses .responseText\n\t\ttry {\n\t\t\tif (this._request.responseText != null) {\n\t\t\t\treturn this._request.responseText;\n\t\t\t}\n\t\t} catch (e) {\n\t\t}\n\n\t\t// When loading XML, IE9 does not return .response, instead it returns responseXML.xml\n\t\ttry {\n\t\t\tif (this._request.responseXML != null) {\n\t\t\t\treturn this._request.responseXML;\n\t\t\t}\n\t\t} catch (e) {\n\t\t}\n\n\t\treturn null;\n\t};\n\n\t/**\n\t * Create an XHR request. Depending on a number of factors, we get totally different results.\n\t * XDomainRequest when loading cross-domain.INTERRUPT_TYPE\n\t * constants on the Sound class, with the default defined by {{#crossLink \"Sound/defaultInterruptBehavior:property\"}}{{/crossLink}}.INTERRUPT_TYPE constants on the Sound class, with the default defined by\n\t\t * {{#crossLink \"Sound/defaultInterruptBehavior:property\"}}{{/crossLink}}.\n\t\t * @property interrupt\n\t\t * @type {string}\n\t\t * @default null\n\t\t */\n\t\tthis.interrupt = null;\n\n\t\t/**\n\t\t * The amount of time to delay the start of audio playback, in milliseconds.\n\t\t * @property delay\n\t\t * @type {Number}\n\t\t * @default null\n\t\t */\n\t\tthis.delay = null;\n\n\t\t/**\n\t\t * The offset from the start of the audio to begin playback, in milliseconds.\n\t\t * @property offset\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.offset = null;\n\n\t\t/**\n\t\t * How many times the audio loops when it reaches the end of playback. The default is 0 (no\n\t\t * loops), and -1 can be used for infinite playback.\n\t\t * @property loop\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.loop = null;\n\n\t\t/**\n\t\t * The volume of the sound, between 0 and 1. Note that the master volume is applied\n\t\t * against the individual volume.\n\t\t * @property volume\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.volume = null;\n\n\t\t/**\n\t\t * The left-right pan of the sound (if supported), between -1 (left) and 1 (right).\n\t\t * @property pan\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.pan = null;\n\n\t\t/**\n\t\t * Used to create an audio sprite (with duration), the initial offset to start playback and loop from, in milliseconds.\n\t\t * @property startTime\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.startTime = null;\n\n\t\t/**\n\t\t * Used to create an audio sprite (with startTime), the amount of time to play the clip for, in milliseconds.\n\t\t * @property duration\n\t\t * @type {number}\n\t\t * @default null\n\t\t */\n\t\tthis.duration = null;\n\t};\n\tvar p = PlayPropsConfig.prototype = {};\n\tvar s = PlayPropsConfig;\n\n\n\t// Static Methods\n\t/**\n\t * Creates a PlayPropsConfig from another PlayPropsConfig or an Object.\n\t *\n\t * @method create\n\t * @param {PlayPropsConfig|Object} value The play properties\n\t * @returns {PlayPropsConfig}\n\t * @static\n\t */\n\ts.create = function (value) {\n\t\tif (typeof (value) === \"string\") {\n\t\t\t// Handle the old API gracefully.\n\t\t\tconsole && (console.warn || console.log)(\"Deprecated behaviour. Sound.play takes a configuration object instead of individual arguments. See docs for info.\");\n\t\t\treturn new createjs.PlayPropsConfig().set({ interrupt: value });\n\t\t} else if (value == null || value instanceof s || value instanceof Object) {\n\t\t\treturn new createjs.PlayPropsConfig().set(value);\n\t\t} else if (value == null) {\n\t\t\tthrow new Error(\"PlayProps configuration not recognized.\");\n\t\t}\n\t};\n\n\t// Public Methods\n\t/**\n\t * Provides a chainable shortcut method for setting a number of properties on the instance.\n\t *\n\t * event.src to handle a particular sound.\n\t * @event fileload\n\t * @param {Object} target The object that dispatched the event.\n\t * @param {String} type The event type.\n\t * @param {String} src The source of the sound that was loaded.\n\t * @param {String} [id] The id passed in when the sound was registered. If one was not provided, it will be null.\n\t * @param {Number|Object} [data] Any additional data associated with the item. If not provided, it will be undefined.\n\t * @since 0.4.1\n\t */\n\n\t/**\n\t * This event is fired when a file fails loading internally. This event is fired for each loaded sound,\n\t * so any handler methods should look up the event.src to handle a particular sound.\n\t * @event fileerror\n\t * @param {Object} target The object that dispatched the event.\n\t * @param {String} type The event type.\n\t * @param {String} src The source of the sound that was loaded.\n\t * @param {String} [id] The id passed in when the sound was registered. If one was not provided, it will be null.\n\t * @param {Number|Object} [data] Any additional data associated with the item. If not provided, it will be undefined.\n\t * @since 0.6.0\n\t */\n\n\n\t// Class Public Methods\n\t/**\n\t * Get the preload rules to allow Sound to be used as a plugin by PreloadJS.\n\t * Any load calls that have the matching type or extension will fire the callback method, and use the resulting\n\t * object, which is potentially modified by Sound. This helps when determining the correct path, as well as\n\t * registering the audio instance(s) with Sound. This method should not be called, except by PreloadJS.\n\t * @method getPreloadHandlers\n\t * @return {Object} An object containing:\n\t * {src:srcURI, id:ID, data:Data}\n\t * with \"id\" and \"data\" being optional.\n\t * You can also pass an object with path and manifest properties, where path is a basePath and manifest is an array of objects to load.\n\t * Note id is required if src is an object with extension labeled src properties.\n\t * @param {string} basePath Set a path that will be prepended to each src when loading. When creating, playing, or removing\n\t * audio that was loaded with a basePath by src, the basePath must be included.\n\t * @return {Object} An array of objects with the modified values that were passed in, which defines each sound.\n\t * Like registerSound, it will return false for any values when the source cannot be parsed or if no plugins can be initialized.\n\t * Also, it will return true for any values when the source is already loaded.\n\t * @static\n\t * @since 0.6.0\n\t */\n\ts.registerSounds = function (sounds, basePath) {\n\t\tvar returnValues = [];\n\t\tif (sounds.path) {\n\t\t\tif (!basePath) {\n\t\t\t\tbasePath = sounds.path;\n\t\t\t} else {\n\t\t\t\tbasePath = basePath + sounds.path;\n\t\t\t}\n\t\t\tsounds = sounds.manifest;\n\t\t\t// TODO document this feature\n\t\t}\n\t\tfor (var i = 0, l = sounds.length; i < l; i++) {\n\t\t\treturnValues[i] = createjs.Sound.registerSound(sounds[i].src, sounds[i].id, sounds[i].data, basePath, sounds[i].defaultPlayProps);\n\t\t}\n\t\treturn returnValues;\n\t};\n\n\t/**\n\t * Remove a sound that has been registered with {{#crossLink \"Sound/registerSound\"}}{{/crossLink}} or\n\t * {{#crossLink \"Sound/registerSounds\"}}{{/crossLink}}.\n\t * {srcOrID:srcURIorID}.\n\t * You can also pass an object with path and manifest properties, where path is a basePath and manifest is an array of objects to remove.\n\t * @param {string} basePath Set a path that will be prepended to each src when removing.\n\t * @return {Object} An array of Boolean values representing if the sounds with the same array index were\n\t * successfully removed.\n\t * @static\n\t * @since 0.4.1\n\t */\n\ts.removeSounds = function (sounds, basePath) {\n\t\tvar returnValues = [];\n\t\tif (sounds.path) {\n\t\t\tif (!basePath) {\n\t\t\t\tbasePath = sounds.path;\n\t\t\t} else {\n\t\t\t\tbasePath = basePath + sounds.path;\n\t\t\t}\n\t\t\tsounds = sounds.manifest;\n\t\t}\n\t\tfor (var i = 0, l = sounds.length; i < l; i++) {\n\t\t\treturnValues[i] = createjs.Sound.removeSound(sounds[i].src, basePath);\n\t\t}\n\t\treturn returnValues;\n\t};\n\n\t/**\n\t * Remove all sounds that have been registered with {{#crossLink \"Sound/registerSound\"}}{{/crossLink}} or\n\t * {{#crossLink \"Sound/registerSounds\"}}{{/crossLink}}.\n\t * myInstance.volume * createjs.Sound._getVolume();\n\t\t *\n\t\t * @property volume\n\t\t * @type {Number}\n\t\t * @default 1\n\t\t */\n\t\tthis._volume = 1;\n\t\tObject.defineProperty(this, \"volume\", {\n\t\t\tget: this._getVolume,\n\t\t\tset: this._setVolume\n\t\t});\n\t\tthis.getVolume = createjs.deprecate(this._getVolume, \"AbstractSoundInstance.getVolume\");\n\t\tthis.setVolume = createjs.deprecate(this._setVolume, \"AbstractSoundInstance.setVolume\");\n\n\t\t/**\n\t\t * The pan of the sound, between -1 (left) and 1 (right). Note that pan is not supported by HTML Audio.\n\t\t *\n\t\t * Note in WebAudioPlugin this only gives us the \"x\" value of what is actually 3D audio\n\t\t * @property pan\n\t\t * @type {Number}\n\t\t * @default 0\n\t\t */\n\t\tthis._pan = 0;\n\t\tObject.defineProperty(this, \"pan\", {\n\t\t\tget: this._getPan,\n\t\t\tset: this._setPan\n\t\t});\n\t\tthis.getPan = createjs.deprecate(this._getPan, \"AbstractSoundInstance.getPan\");\n\t\tthis.setPan = createjs.deprecate(this._setPan, \"AbstractSoundInstance.setPan\");\n\n\t\t/**\n\t\t * Audio sprite property used to determine the starting offset.\n\t\t * @property startTime\n\t\t * @type {Number}\n\t\t * @default 0\n\t\t * @since 0.6.1\n\t\t */\n\t\tthis._startTime = Math.max(0, startTime || 0);\n\t\tObject.defineProperty(this, \"startTime\", {\n\t\t\tget: this._getStartTime,\n\t\t\tset: this._setStartTime\n\t\t});\n\t\tthis.getStartTime = createjs.deprecate(this._getStartTime, \"AbstractSoundInstance.getStartTime\");\n\t\tthis.setStartTime = createjs.deprecate(this._setStartTime, \"AbstractSoundInstance.setStartTime\");\n\n\t\t/**\n\t\t * Sets or gets the length of the audio clip, value is in milliseconds.\n\t\t *\n\t\t * @property duration\n\t\t * @type {Number}\n\t\t * @default 0\n\t\t * @since 0.6.0\n\t\t */\n\t\tthis._duration = Math.max(0, duration || 0);\n\t\tObject.defineProperty(this, \"duration\", {\n\t\t\tget: this._getDuration,\n\t\t\tset: this._setDuration\n\t\t});\n\t\tthis.getDuration = createjs.deprecate(this._getDuration, \"AbstractSoundInstance.getDuration\");\n\t\tthis.setDuration = createjs.deprecate(this._setDuration, \"AbstractSoundInstance.setDuration\");\n\n\t\t/**\n\t\t * Object that holds plugin specific resource need for audio playback.\n\t\t * This is set internally by the plugin. For example, WebAudioPlugin will set an array buffer,\n\t\t * HTMLAudioPlugin will set a tag, FlashAudioPlugin will set a flash reference.\n\t\t *\n\t\t * @property playbackResource\n\t\t * @type {Object}\n\t\t * @default null\n\t\t */\n\t\tthis._playbackResource = null;\n\t\tObject.defineProperty(this, \"playbackResource\", {\n\t\t\tget: this._getPlaybackResource,\n\t\t\tset: this._setPlaybackResource\n\t\t});\n\t\tif (playbackResource !== false && playbackResource !== true) { this._setPlaybackResource(playbackResource); }\n\t\tthis.getPlaybackResource = createjs.deprecate(this._getPlaybackResource, \"AbstractSoundInstance.getPlaybackResource\");\n\t\tthis.setPlaybackResource = createjs.deprecate(this._setPlaybackResource, \"AbstractSoundInstance.setPlaybackResource\");\n\n\t\t/**\n\t\t * The position of the playhead in milliseconds. This can be set while a sound is playing, paused, or stopped.\n\t\t *\n\t\t * @property position\n\t\t * @type {Number}\n\t\t * @default 0\n\t\t * @since 0.6.0\n\t\t */\n\t\tthis._position = 0;\n\t\tObject.defineProperty(this, \"position\", {\n\t\t\tget: this._getPosition,\n\t\t\tset: this._setPosition\n\t\t});\n\t\tthis.getPosition = createjs.deprecate(this._getPosition, \"AbstractSoundInstance.getPosition\");\n\t\tthis.setPosition = createjs.deprecate(this._setPosition, \"AbstractSoundInstance.setPosition\");\n\n\t\t/**\n\t\t * The number of play loops remaining. Negative values will loop infinitely.\n\t\t *\n\t\t * @property loop\n\t\t * @type {Number}\n\t\t * @default 0\n\t\t * @public\n\t\t * @since 0.6.0\n\t\t */\n\t\tthis._loop = 0;\n\t\tObject.defineProperty(this, \"loop\", {\n\t\t\tget: this._getLoop,\n\t\t\tset: this._setLoop\n\t\t});\n\t\tthis.getLoop = createjs.deprecate(this._getLoop, \"AbstractSoundInstance.getLoop\");\n\t\tthis.setLoop = createjs.deprecate(this._setLoop, \"AbstractSoundInstance.setLoop\");\n\n\t\t/**\n\t\t * Mutes or unmutes the current audio instance.\n\t\t *\n\t\t * @property muted\n\t\t * @type {Boolean}\n\t\t * @default false\n\t\t * @since 0.6.0\n\t\t */\n\t\tthis._muted = false;\n\t\tObject.defineProperty(this, \"muted\", {\n\t\t\tget: this._getMuted,\n\t\t\tset: this._setMuted\n\t\t});\n\t\tthis.getMuted = createjs.deprecate(this._getMuted, \"AbstractSoundInstance.getMuted\");\n\t\tthis.setMuted = createjs.deprecate(this._setMuted, \"AbstractSoundInstance.setMuted\");\n\n\t\t/**\n\t\t * Pauses or resumes the current audio instance.\n\t\t *\n\t\t * @property paused\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._paused = false;\n\t\tObject.defineProperty(this, \"paused\", {\n\t\t\tget: this._getPaused,\n\t\t\tset: this._setPaused\n\t\t});\n\t\tthis.getPaused = createjs.deprecate(this._getPaused, \"AbstractSoundInstance.getPaused\");\n\t\tthis.setPaused = createjs.deprecate(this._setPaused, \"AbstractSoundInstance.setPaused\");\n\n\n\t\t// Events\n\t\t/**\n\t\t * The event that is fired when playback has started successfully.\n\t\t * @event succeeded\n\t\t * @param {Object} target The object that dispatched the event.\n\t\t * @param {String} type The event type.\n\t\t * @since 0.4.0\n\t\t */\n\n\t\t/**\n\t\t * The event that is fired when playback is interrupted. This happens when another sound with the same\n\t\t * src property is played using an interrupt value that causes this instance to stop playing.\n\t\t * @event interrupted\n\t\t * @param {Object} target The object that dispatched the event.\n\t\t * @param {String} type The event type.\n\t\t * @since 0.4.0\n\t\t */\n\n\t\t/**\n\t\t * The event that is fired when playback has failed. This happens when there are too many channels with the same\n\t\t * src property already playing (and the interrupt value doesn't cause an interrupt of another instance), or\n\t\t * the sound could not be played, perhaps due to a 404 error.\n\t\t * @event failed\n\t\t * @param {Object} target The object that dispatched the event.\n\t\t * @param {String} type The event type.\n\t\t * @since 0.4.0\n\t\t */\n\n\t\t/**\n\t\t * The event that is fired when a sound has completed playing but has loops remaining.\n\t\t * @event loop\n\t\t * @param {Object} target The object that dispatched the event.\n\t\t * @param {String} type The event type.\n\t\t * @since 0.4.0\n\t\t */\n\n\t\t/**\n\t\t * The event that is fired when playback completes. This means that the sound has finished playing in its\n\t\t * entirety, including its loop iterations.\n\t\t * @event complete\n\t\t * @param {Object} target The object that dispatched the event.\n\t\t * @param {String} type The event type.\n\t\t * @since 0.4.0\n\t\t */\n\t};\n\n\tvar p = createjs.extend(AbstractSoundInstance, createjs.EventDispatcher);\n\n\t// Public Methods:\n\t/**\n\t * Play an instance. This method is intended to be called on SoundInstances that already exist (created\n\t * with the Sound API {{#crossLink \"Sound/createInstance\"}}{{/crossLink}} or {{#crossLink \"Sound/play\"}}{{/crossLink}}).\n\t *\n\t * Loader instance, which PreloadJS\n\t * can use to assist with preloading.\n\t * @method register\n\t * @param {String} loadItem An Object containing the source of the audio\n\t * Note that not every plugin will manage this value.\n\t * @return {Object} A result object, containing a \"tag\" for preloading purposes.\n\t */\n\tp.register = function (loadItem) {\n\t\tvar loader = this._loaders[loadItem.src];\n\t\tif (loader && !loader.canceled) { return this._loaders[loadItem.src]; }\t// already loading/loaded this, so don't load twice\n\t\t// OJR potential issue that we won't be firing loaded event, might need to trigger if this is already loaded?\n\t\tthis._audioSources[loadItem.src] = true;\n\t\tthis._soundInstances[loadItem.src] = [];\n\t\tloader = new this._loaderClass(loadItem);\n\t\tloader.on(\"complete\", this._handlePreloadComplete, this);\n\t\tthis._loaders[loadItem.src] = loader;\n\t\treturn loader;\n\t};\n\n\t// note sound calls register before calling preload\n\t/**\n\t * Internally preload a sound.\n\t * @method preload\n\t * @param {Loader} loader The sound URI to load.\n\t */\n\tp.preload = function (loader) {\n\t\tloader.on(\"error\", this._handlePreloadError, this);\n\t\tloader.load();\n\t};\n\n\t/**\n\t * Checks if preloading has started for a specific source. If the source is found, we can assume it is loading,\n\t * or has already finished loading.\n\t * @method isPreloadStarted\n\t * @param {String} src The sound URI to check.\n\t * @return {Boolean}\n\t */\n\tp.isPreloadStarted = function (src) {\n\t\treturn (this._audioSources[src] != null);\n\t};\n\n\t/**\n\t * Checks if preloading has finished for a specific source.\n\t * @method isPreloadComplete\n\t * @param {String} src The sound URI to load.\n\t * @return {Boolean}\n\t */\n\tp.isPreloadComplete = function (src) {\n\t\treturn (!(this._audioSources[src] == null || this._audioSources[src] == true));\n\t};\n\n\t/**\n\t * Remove a sound added using {{#crossLink \"WebAudioPlugin/register\"}}{{/crossLink}}. Note this does not cancel a preload.\n\t * @method removeSound\n\t * @param {String} src The sound URI to unload.\n\t */\n\tp.removeSound = function (src) {\n\t\tif (!this._soundInstances[src]) { return; }\n\t\tfor (var i = this._soundInstances[src].length; i--;) {\n\t\t\tvar item = this._soundInstances[src][i];\n\t\t\titem.destroy();\n\t\t}\n\t\tdelete (this._soundInstances[src]);\n\t\tdelete (this._audioSources[src]);\n\t\tif (this._loaders[src]) { this._loaders[src].destroy(); }\n\t\tdelete (this._loaders[src]);\n\t};\n\n\t/**\n\t * Remove all sounds added using {{#crossLink \"WebAudioPlugin/register\"}}{{/crossLink}}. Note this does not cancel a preload.\n\t * @method removeAllSounds\n\t * @param {String} src The sound URI to unload.\n\t */\n\tp.removeAllSounds = function () {\n\t\tfor (var key in this._audioSources) {\n\t\t\tthis.removeSound(key);\n\t\t}\n\t};\n\n\t/**\n\t * Create a sound instance. If the sound has not been preloaded, it is internally preloaded here.\n\t * @method create\n\t * @param {String} src The sound source to use.\n\t * @param {Number} startTime Audio sprite property used to apply an offset, in milliseconds.\n\t * @param {Number} duration Audio sprite property used to set the time the clip plays for, in milliseconds.\n\t * @return {AbstractSoundInstance} A sound instance for playback and control.\n\t */\n\tp.create = function (src, startTime, duration) {\n\t\tif (!this.isPreloadStarted(src)) {\n\t\t\tthis.preload(this.register(src));\n\t\t}\n\t\tvar si = new this._soundInstanceClass(src, startTime, duration, this._audioSources[src]);\n\t\tif (this._soundInstances[src]) {\n\t\t\tthis._soundInstances[src].push(si);\n\t\t}\n\n\t\t// Plugins that don't have a setVolume should implement a setMasterVolune/setMasterMute\n\t\t// So we have to check that here.\n\t\tsi.setMasterVolume && si.setMasterVolume(createjs.Sound.volume);\n\t\tsi.setMasterMute && si.setMasterMute(createjs.Sound.muted);\n\n\t\treturn si;\n\t};\n\n\t// if a plugin does not support volume and mute, it should set these to null\n\t/**\n\t * Set the master volume of the plugin, which affects all SoundInstances.\n\t * @method setVolume\n\t * @param {Number} value The volume to set, between 0 and 1.\n\t * @return {Boolean} If the plugin processes the setVolume call (true). The Sound class will affect all the\n\t * instances manually otherwise.\n\t */\n\tp.setVolume = function (value) {\n\t\tthis._volume = value;\n\t\tthis._updateVolume();\n\t\treturn true;\n\t};\n\n\t/**\n\t * Get the master volume of the plugin, which affects all SoundInstances.\n\t * @method getVolume\n\t * @return {Number} The volume level, between 0 and 1.\n\t */\n\tp.getVolume = function () {\n\t\treturn this._volume;\n\t};\n\n\t/**\n\t * Mute all sounds via the plugin.\n\t * @method setMute\n\t * @param {Boolean} value If all sound should be muted or not. Note that plugin-level muting just looks up\n\t * the mute value of Sound {{#crossLink \"Sound/muted:property\"}}{{/crossLink}}, so this property is not used here.\n\t * @return {Boolean} If the mute call succeeds.\n\t */\n\tp.setMute = function (value) {\n\t\tthis._updateVolume();\n\t\treturn true;\n\t};\n\n\t// plugins should overwrite this method\n\tp.toString = function () {\n\t\treturn \"[AbstractPlugin]\";\n\t};\n\n\n\t// private methods:\n\t/**\n\t * Handles internal preload completion.\n\t * @method _handlePreloadComplete\n\t * @param event\n\t * @protected\n\t */\n\tp._handlePreloadComplete = function (event) {\n\t\tvar src = event.target.getItem().src;\n\t\tthis._audioSources[src] = event.result;\n\t\tfor (var i = 0, l = this._soundInstances[src].length; i < l; i++) {\n\t\t\tvar item = this._soundInstances[src][i];\n\t\t\titem.playbackResource = this._audioSources[src];\n\t\t\t// ToDo consider adding play call here if playstate == playfailed\n\t\t\tthis._soundInstances[src] = null;\n\t\t}\n\t};\n\n\t/**\n\t * Handles internal preload errors\n\t * @method _handlePreloadError\n\t * @param event\n\t * @protected\n\t */\n\tp._handlePreloadError = function (event) {\n\t\t//delete(this._audioSources[src]);\n\t};\n\n\t/**\n\t * Set the gain value for master audio. Should not be called externally.\n\t * @method _updateVolume\n\t * @protected\n\t */\n\tp._updateVolume = function () {\n\t\t// Plugin Specific code\n\t};\n\n\tcreatejs.AbstractPlugin = AbstractPlugin;\n}());\n\n//##############################################################################\n// WebAudioLoader.js\n//##############################################################################\n\n\n\n(function () {\n\t\"use strict\";\n\n\t/**\n\t * Loader provides a mechanism to preload Web Audio content via PreloadJS or internally. Instances are returned to\n\t * the preloader, and the load method is called when the asset needs to be requested.\n\t *\n\t * @class WebAudioLoader\n\t * @param {String} loadItem The item to be loaded\n\t * @extends XHRRequest\n\t * @protected\n\t */\n\tfunction Loader(loadItem) {\n\t\tthis.AbstractLoader_constructor(loadItem, true, createjs.Types.SOUND);\n\n\t}\n\tvar p = createjs.extend(Loader, createjs.AbstractLoader);\n\n\t/**\n\t * web audio context required for decoding audio\n\t * @property context\n\t * @type {AudioContext}\n\t * @static\n\t */\n\tLoader.context = null;\n\n\n\t// public methods\n\tp.toString = function () {\n\t\treturn \"[WebAudioLoader]\";\n\t};\n\n\n\t// private methods\n\tp._createRequest = function () {\n\t\tthis._request = new createjs.XHRRequest(this._item, false);\n\t\tthis._request.setResponseType(\"arraybuffer\");\n\t};\n\n\tp._sendComplete = function (event) {\n\t\t// OJR we leave this wrapped in Loader because we need to reference src and the handler only receives a single argument, the decodedAudio\n\t\tLoader.context.decodeAudioData(this._rawResult,\n\t\t\tcreatejs.proxy(this._handleAudioDecoded, this),\n\t\t\tcreatejs.proxy(this._sendError, this));\n\t};\n\n\n\t/**\n\t* The audio has been decoded.\n\t* @method handleAudioDecoded\n\t* @param decoded\n\t* @protected\n\t*/\n\tp._handleAudioDecoded = function (decodedAudio) {\n\t\tthis._result = decodedAudio;\n\t\tthis.AbstractLoader__sendComplete();\n\t};\n\n\tcreatejs.WebAudioLoader = createjs.promote(Loader, \"AbstractLoader\");\n}());\n\n//##############################################################################\n// WebAudioSoundInstance.js\n//##############################################################################\n\n\n\n/**\n * WebAudioSoundInstance extends the base api of {{#crossLink \"AbstractSoundInstance\"}}{{/crossLink}} and is used by\n * {{#crossLink \"WebAudioPlugin\"}}{{/crossLink}}.\n *\n * WebAudioSoundInstance exposes audioNodes for advanced users.\n *\n * @param {String} src The path to and file name of the sound.\n * @param {Number} startTime Audio sprite property used to apply an offset, in milliseconds.\n * @param {Number} duration Audio sprite property used to set the time the clip plays for, in milliseconds.\n * @param {Object} playbackResource Any resource needed by plugin to support audio playback.\n * @class WebAudioSoundInstance\n * @extends AbstractSoundInstance\n * @constructor\n */\n(function () {\n\t\"use strict\";\n\n\tfunction WebAudioSoundInstance(src, startTime, duration, playbackResource) {\n\t\tthis.AbstractSoundInstance_constructor(src, startTime, duration, playbackResource);\n\n\n\t\t// public properties\n\t\t/**\n\t\t * NOTE this is only intended for use by advanced users.\n\t\t * WebAudioSoundInstance volume. Connected to the {{#crossLink \"WebAudioSoundInstance/destinationNode:property\"}}{{/crossLink}}.\n\t\t * @property gainNode\n\t\t * @type {AudioGainNode}\n\t\t * @since 0.4.0\n\t\t *\n\t\t */\n\t\tthis.gainNode = s.context.createGain();\n\n\t\t/**\n\t\t * NOTE this is only intended for use by advanced users.\n\t\t * context.destination\n\t * @property destinationNode\n\t * @type {AudioNode}\n\t * @static\n\t * @since 0.6.0\n\t */\n\ts.destinationNode = null;\n\n\t/**\n\t * Value to set panning model to equal power for WebAudioSoundInstance. Can be \"equalpower\" or 0 depending on browser implementation.\n\t * @property _panningModel\n\t * @type {Number / String}\n\t * @protected\n\t * @static\n\t * @since 0.6.0\n\t */\n\ts._panningModel = \"equalpower\";\n\n\n\t// Public methods\n\tp.destroy = function () {\n\t\tthis.AbstractSoundInstance_destroy();\n\n\t\tthis.panNode.disconnect(0);\n\t\tthis.panNode = null;\n\t\tthis.gainNode.disconnect(0);\n\t\tthis.gainNode = null;\n\t};\n\n\tp.toString = function () {\n\t\treturn \"[WebAudioSoundInstance]\";\n\t};\n\n\n\t// Private Methods\n\tp._updatePan = function () {\n\t\tthis.panNode.setPosition(this._pan, 0, -0.5);\n\t\t// z need to be -0.5 otherwise the sound only plays in left, right, or center\n\t};\n\n\tp._removeLooping = function (value) {\n\t\tthis._sourceNodeNext = this._cleanUpAudioNode(this._sourceNodeNext);\n\t};\n\n\tp._addLooping = function (value) {\n\t\tif (this.playState != createjs.Sound.PLAY_SUCCEEDED) { return; }\n\t\tthis._sourceNodeNext = this._createAndPlayAudioNode(this._playbackStartTime, 0);\n\t};\n\n\tp._setDurationFromSource = function () {\n\t\tthis._duration = this.playbackResource.duration * 1000;\n\t};\n\n\tp._handleCleanUp = function () {\n\t\tif (this.sourceNode && this.playState == createjs.Sound.PLAY_SUCCEEDED) {\n\t\t\tthis.sourceNode = this._cleanUpAudioNode(this.sourceNode);\n\t\t\tthis._sourceNodeNext = this._cleanUpAudioNode(this._sourceNodeNext);\n\t\t}\n\n\t\tif (this.gainNode.numberOfOutputs != 0) { this.gainNode.disconnect(0); }\n\t\t// OJR there appears to be a bug that this doesn't always work in webkit (Chrome and Safari). According to the documentation, this should work.\n\n\t\tclearTimeout(this._soundCompleteTimeout);\n\n\t\tthis._playbackStartTime = 0;\t// This is used by _getPosition\n\t};\n\n\t/**\n\t * Turn off and disconnect an audioNode, then set reference to null to release it for garbage collection\n\t * @method _cleanUpAudioNode\n\t * @param audioNode\n\t * @return {audioNode}\n\t * @protected\n\t * @since 0.4.1\n\t */\n\tp._cleanUpAudioNode = function (audioNode) {\n\t\tif (audioNode) {\n\t\t\taudioNode.stop(0);\n\t\t\taudioNode.disconnect(0);\n\t\t\t// necessary to prevent leak on iOS Safari 7-9. will throw in almost all other\n\t\t\t// browser implementations.\n\t\t\tif (createjs.BrowserDetect.isIOS) {\n\t\t\t\ttry { audioNode.buffer = s._scratchBuffer; } catch (e) { }\n\t\t\t}\n\t\t\taudioNode = null;\n\t\t}\n\t\treturn audioNode;\n\t};\n\n\tp._handleSoundReady = function (event) {\n\t\tthis.gainNode.connect(s.destinationNode); // this line can cause a memory leak. Nodes need to be disconnected from the audioDestination or any sequence that leads to it.\n\n\t\tvar dur = this._duration * 0.001,\n\t\t\tpos = Math.min(Math.max(0, this._position) * 0.001, dur);\n\t\tthis.sourceNode = this._createAndPlayAudioNode((s.context.currentTime - dur), pos);\n\t\tthis._playbackStartTime = this.sourceNode.startTime - pos;\n\n\t\tthis._soundCompleteTimeout = setTimeout(this._endedHandler, (dur - pos) * 1000);\n\n\t\tif (this._loop != 0) {\n\t\t\tthis._sourceNodeNext = this._createAndPlayAudioNode(this._playbackStartTime, 0);\n\t\t}\n\t};\n\n\t/**\n\t * Creates an audio node using the current src and context, connects it to the gain node, and starts playback.\n\t * @method _createAndPlayAudioNode\n\t * @param {Number} startTime The time to add this to the web audio context, in seconds.\n\t * @param {Number} offset The amount of time into the src audio to start playback, in seconds.\n\t * @return {audioNode}\n\t * @protected\n\t * @since 0.4.1\n\t */\n\tp._createAndPlayAudioNode = function (startTime, offset) {\n\t\tvar audioNode = s.context.createBufferSource();\n\t\taudioNode.buffer = this.playbackResource;\n\t\taudioNode.connect(this.panNode);\n\t\tvar dur = this._duration * 0.001;\n\t\taudioNode.startTime = startTime + dur;\n\t\taudioNode.start(audioNode.startTime, offset + (this._startTime * 0.001), dur - offset);\n\t\treturn audioNode;\n\t};\n\n\tp._pause = function () {\n\t\tthis._position = (s.context.currentTime - this._playbackStartTime) * 1000; // * 1000 to give milliseconds, lets us restart at same point\n\t\tthis.sourceNode = this._cleanUpAudioNode(this.sourceNode);\n\t\tthis._sourceNodeNext = this._cleanUpAudioNode(this._sourceNodeNext);\n\n\t\tif (this.gainNode.numberOfOutputs != 0) { this.gainNode.disconnect(0); }\n\n\t\tclearTimeout(this._soundCompleteTimeout);\n\t};\n\n\tp._resume = function () {\n\t\tthis._handleSoundReady();\n\t};\n\n\t/*\n\tp._handleStop = function () {\n\t\t// web audio does not need to do anything extra\n\t};\n\t*/\n\n\tp._updateVolume = function () {\n\t\tvar newVolume = this._muted ? 0 : this._volume;\n\t\tif (newVolume != this.gainNode.gain.value) {\n\t\t\tthis.gainNode.gain.value = newVolume;\n\t\t}\n\t};\n\n\tp._calculateCurrentPosition = function () {\n\t\treturn ((s.context.currentTime - this._playbackStartTime) * 1000); // pos in seconds * 1000 to give milliseconds\n\t};\n\n\tp._updatePosition = function () {\n\t\tthis.sourceNode = this._cleanUpAudioNode(this.sourceNode);\n\t\tthis._sourceNodeNext = this._cleanUpAudioNode(this._sourceNodeNext);\n\t\tclearTimeout(this._soundCompleteTimeout);\n\n\t\tif (!this._paused) { this._handleSoundReady(); }\n\t};\n\n\t// OJR we are using a look ahead approach to ensure smooth looping.\n\t// We add _sourceNodeNext to the audio context so that it starts playing even if this callback is delayed.\n\t// This technique is described here: http://www.html5rocks.com/en/tutorials/audio/scheduling/\n\t// NOTE the cost of this is that our audio loop may not always match the loop event timing precisely.\n\tp._handleLoop = function () {\n\t\tthis._cleanUpAudioNode(this.sourceNode);\n\t\tthis.sourceNode = this._sourceNodeNext;\n\t\tthis._playbackStartTime = this.sourceNode.startTime;\n\t\tthis._sourceNodeNext = this._createAndPlayAudioNode(this._playbackStartTime, 0);\n\t\tthis._soundCompleteTimeout = setTimeout(this._endedHandler, this._duration);\n\t};\n\n\tp._updateDuration = function () {\n\t\tif (this.playState == createjs.Sound.PLAY_SUCCEEDED) {\n\t\t\tthis._pause();\n\t\t\tthis._resume();\n\t\t}\n\t};\n\n\tcreatejs.WebAudioSoundInstance = createjs.promote(WebAudioSoundInstance, \"AbstractSoundInstance\");\n}());\n\n//##############################################################################\n// WebAudioPlugin.js\n//##############################################################################\n\n\n\n(function () {\n\n\t\"use strict\";\n\n\t/**\n\t * Play sounds using Web Audio in the browser. The WebAudioPlugin is currently the default plugin, and will be used\n\t * anywhere that it is supported. To change plugin priority, check out the Sound API\n\t * {{#crossLink \"Sound/registerPlugins\"}}{{/crossLink}} method.\n\n\t * context.destination.\n\t\t *\n\t\t * Can be accessed by advanced users through createjs.Sound.activePlugin.dynamicsCompressorNode.\n\t\t * @property dynamicsCompressorNode\n\t\t * @type {AudioNode}\n\t\t */\n\t\tthis.dynamicsCompressorNode = this.context.createDynamicsCompressor();\n\t\tthis.dynamicsCompressorNode.connect(this.context.destination);\n\n\t\t/**\n\t\t * A GainNode for controlling master volume. It is connected to {{#crossLink \"WebAudioPlugin/dynamicsCompressorNode:property\"}}{{/crossLink}}.\n\t\t *\n\t\t * Can be accessed by advanced users through createjs.Sound.activePlugin.gainNode.\n\t\t * @property gainNode\n\t\t * @type {AudioGainNode}\n\t\t */\n\t\tthis.gainNode = this.context.createGain();\n\t\tthis.gainNode.connect(this.dynamicsCompressorNode);\n\t\tcreatejs.WebAudioSoundInstance.destinationNode = this.gainNode;\n\n\t\tthis._capabilities = s._capabilities;\n\n\t\tthis._loaderClass = createjs.WebAudioLoader;\n\t\tthis._soundInstanceClass = createjs.WebAudioSoundInstance;\n\n\t\tthis._addPropsToClasses();\n\t}\n\tvar p = createjs.extend(WebAudioPlugin, createjs.AbstractPlugin);\n\n\t// Static Properties\n\tvar s = WebAudioPlugin;\n\t/**\n\t * The capabilities of the plugin. This is generated via the {{#crossLink \"WebAudioPlugin/_generateCapabilities:method\"}}{{/crossLink}}\n\t * method and is used internally.\n\t * @property _capabilities\n\t * @type {Object}\n\t * @default null\n\t * @private\n\t * @static\n\t */\n\ts._capabilities = null;\n\n\t/**\n\t * Value to set panning model to equal power for WebAudioSoundInstance. Can be \"equalpower\" or 0 depending on browser implementation.\n\t * @property _panningModel\n\t * @type {Number / String}\n\t * @private\n\t * @static\n\t */\n\ts._panningModel = \"equalpower\";\n\n\t/**\n\t * The web audio context, which WebAudio uses to play audio. All nodes that interact with the WebAudioPlugin\n\t * need to be created within this context.\n\t *\n\t * Advanced users can set this to an existing context, but must do so before they call\n\t * {{#crossLink \"Sound/registerPlugins\"}}{{/crossLink}} or {{#crossLink \"Sound/initializeDefaultPlugins\"}}{{/crossLink}}.\n\t *\n\t * @property context\n\t * @type {AudioContext}\n\t * @static\n\t */\n\ts.context = null;\n\n\t/**\n\t * The scratch buffer that will be assigned to the buffer property of a source node on close.\n\t * Works around an iOS Safari bug: https://github.com/CreateJS/SoundJS/issues/102\n\t *\n\t * Advanced users can set this to an existing source node, but must do so before they call\n\t * {{#crossLink \"Sound/registerPlugins\"}}{{/crossLink}} or {{#crossLink \"Sound/initializeDefaultPlugins\"}}{{/crossLink}}.\n\t *\n\t * @property _scratchBuffer\n\t * @type {AudioBuffer}\n\t * @private\n\t * @static\n\t */\n\ts._scratchBuffer = null;\n\n\t/**\n\t * Indicated whether audio on iOS has been unlocked, which requires a touchend/mousedown event that plays an\n\t * empty sound.\n\t * @property _unlocked\n\t * @type {boolean}\n\t * @since 0.6.2\n\t * @private\n\t */\n\ts._unlocked = false;\n\n\t/**\n\t * The default sample rate used when checking for iOS compatibility. See {{#crossLink \"WebAudioPlugin/_createAudioContext\"}}{{/crossLink}}.\n\t * @property DEFAULT_SAMPLE_REATE\n\t * @type {number}\n\t * @default 44100\n\t * @static\n\t */\n\ts.DEFAULT_SAMPLE_RATE = 44100;\n\n\t// Static Public Methods\n\t/**\n\t * Determine if the plugin can be used in the current browser/OS.\n\t * @method isSupported\n\t * @return {Boolean} If the plugin can be initialized.\n\t * @static\n\t */\n\ts.isSupported = function () {\n\t\t// check if this is some kind of mobile device, Web Audio works with local protocol under PhoneGap and it is unlikely someone is trying to run a local file\n\t\tvar isMobilePhoneGap = createjs.BrowserDetect.isIOS || createjs.BrowserDetect.isAndroid || createjs.BrowserDetect.isBlackberry;\n\t\t// OJR isMobile may be redundant with _isFileXHRSupported available. Consider removing.\n\t\tif (location.protocol == \"file:\" && !isMobilePhoneGap && !this._isFileXHRSupported()) { return false; } // Web Audio requires XHR, which is not usually available locally\n\t\ts._generateCapabilities();\n\t\tif (s.context == null) { return false; }\n\t\treturn true;\n\t};\n\n\t/**\n\t * Plays an empty sound in the web audio context. This is used to enable web audio on iOS devices, as they\n\t * require the first sound to be played inside of a user initiated event (touch/click). This is called when\n\t * {{#crossLink \"WebAudioPlugin\"}}{{/crossLink}} is initialized (by Sound {{#crossLink \"Sound/initializeDefaultPlugins\"}}{{/crossLink}}\n\t * for example).\n\t *\n\t *