             chooseAudio(chooseAudioButton)
             return
         }
+        updateInfo()
         guard node != player else { return }
         guard let player = player else { return }
 

    var player: AKPlayer?
    var node: AKNode? {
        didSet {
            chooseAudioButton.isEnabled = node == player
            inputSourceInfo.stringValue = node == player ? "🔊 \(audioTitle)" : "🔊 ⏦ \(oscillator.frequency) hz"
        }
    }


        handleUpdateParam(slider2)
    }

    private func updateInfo() {
        chooseAudioButton.isEnabled = node == player
        inputSourceInfo.stringValue = node == player ? "🔊 \(audioTitle)" : "🔊 ⏦ \(oscillator.frequency) hz"
    }
    private func initOscillator() {
        guard node != oscillator else { return }
        booster.disconnectInput()
