         )
 
         let mix = AKMix(input1: audioSource, input2: delay, balance: 0.5.ak)
-        connect(mix)
 
-        connect(AKAudioOutput(audioSource:mix))
+        setAudioOutput(mix)
 
         resetParameter(audioSource)
     }

        connect(audio)

        let mono = AKMix(input1: audio.leftOutput, input2: audio.rightOutput, balance: 0.5.ak)
        connect(mono)

        auxilliaryOutput = AKAudio.globalParameter()
        assignOutput(auxilliaryOutput, to:mono)

    init(audioSource: AKAudio) {
        super.init()

        let feedbackLine = AKLine(
            firstPoint: 0.ak,
            secondPoint: 1.ak,
            durationBetweenPoints: testDuration.ak
        )

        let delay = AKDelay(input: audioSource, delayTime: 0.1.ak)
        delay.feedback = feedbackLine
