/** * @private */Ext.define('Ext.util.Audio', { singleton: true, ctx: null, beep: function(callback) { this.oscillate(200, 1, callback); }, oscillate: function(duration, type, callback) { var osc; if (!this.ctx) { this.ctx = new (window.audioContext || window.webkitAudioContext); } if (!this.ctx) { console.log("BEEP"); return; } type = (type % 5) || 0; try { osc = this.ctx.createOscillator(); osc.type = type; osc.connect(this.ctx.destination); osc.noteOn(0); Ext.defer(function() { osc.noteOff(0); if (callback) { callback(); } }, duration); } catch (e) { throw new Error("[Ext.util.Audio.oscillate] Error with Oscillator playback"); } } });