     
     /**
     Initializes a new audio player from a given file name
+    
+        let ap = C4AudioPlayer("audioTrackFileName")
     */
     convenience public init(_ filename: String) {
         self.init(filenames: [filename])

            currentPlayer.enableRate = v
        }
    }

    public func updateMeters() {
        currentPlayer.updateMeters()
    }

    public func averagePower(channel: Int) -> Double {
        return Double(currentPlayer.averagePowerForChannel(channel))
    }

    public func peakPower(channel: Int) -> Double {
        return Double(currentPlayer.peakPowerForChannel(channel))
    }

    The audio player’s playback rate.
    This property’s default value of 1.0 provides normal playback rate. The available range is from 0.5 for half-speed playback through 2.0 for double-speed playback.
    To set an audio player’s playback rate, you must first enable rate adjustment as described in the enableRate property description.
        
        let ap = C4AudioPlayer("audioTrackFileName")
        ap.enableRate = true
        ap.rate = 0.5
        ap.play()

    */
    public var rate: Double {
        get {
