/**
 * @class ChainBuilder
 * @private
 * @param {AudioContext} audioContext The audio context.
 */

    /**
     * Cleans up.
     * @method ChainBuilder#destroy
     */

    /**
     * Gets the nodes.
     * @method ChainBuilder#nodes
     * @return {Object}
     */

    /**
     * Gets the first node.
     * @method ChainBuilder#first
     * @return {Object}
     */

    /**
     * Gets the last node.
     * @method ChainBuilder#last
     * @return {Object}
     */

    /**
     * Adds a node to the chain.
     * @method ChainBuilder#_addNode
     * @private
     * @param {*} node
     * @param {*} properties
     */

    /**
     * Clones the bufferSource. Used just before playing a sound.
     * @method ChainBuilder#cloneBufferSource
     * @returns {AudioBufferSourceNode} The clone AudioBufferSourceNode.
     */

    /**
     * Adds a bufferSource.
     * @method ChainBuilder#bufferSrouce
     * @param {Object} [properties] Properties to set in the created node.
     */

    /**
     * Adds a createMediaStreamSource.
     * @method ChainBuilder#mediaStreamSource
     * @param {Object} [properties] Properties to set in the created node.
     */

    /**
     * Adds a createMediaElementSource.
     * @method ChainBuilder#mediaElementSource
     * @param  {HTMLElement} element    The element to add.
     * @param {Object} [properties] Properties to set in the created node.
     */

    /**
     * Adds a panner.
     * @method ChainBuilder#panner
     * @param {Object} [properties] Properties to set in the created node.
     */

    /**
     * Adds an analyser.
     * @method ChainBuilder#analyser
     * @param {Object} [properties] Properties to set in the created node.
     */

    /**
     * Adds a gainNode.
     * @method ChainBuilder#gainNode
     * @param {Object} [properties] Properties to set in the created node.
     */