         }
 
         guard let tree = internalAU?.parameterTree else { return }
-
+            
         baseFrequencyParameter        = tree.valueForKey("baseFrequency")        as? AUParameter
         carrierMultiplierParameter    = tree.valueForKey("carrierMultiplier")    as? AUParameter
         modulatingMultiplierParameter = tree.valueForKey("modulatingMultiplier") as? AUParameter

                }
            }
        }

    }
}

        modulatingMultiplier: Float = 1,
        modulationIndex: Float = 1,
        amplitude: Float = 1) {

        self.baseFrequency = baseFrequency
        self.carrierMultiplier = carrierMultiplier
        self.modulatingMultiplier = modulatingMultiplier
