     static let tremoloWaveform = Setting<Float>(key: "tremoloWaveform", defaultValue: AKLowFrequencyOscillator.waveformTypeForSine().value)
     static let tremoloDepth = Setting<Float>(key: "tremoloDepth", defaultValue: 0.0)
     static let tremoloFrequency = Setting<Float>(key: "tremoloFrequency", defaultValue: 0.0)
-    
-    static let envelopeAttack = Setting<Float>(key: "envelopeAttack", defaultValue: 0.002)
-    static let envelopeDecay = Setting<Float>(key: "envelopeDecay", defaultValue: 0.002)
-    static let envelopeSustain = Setting<Float>(key: "envelopeSustain", defaultValue: 1.0)
-    static let envelopeRelease = Setting<Float>(key: "envelopeRelease", defaultValue: 0.002)
-    
-    static let keyboardLeftInterval = Setting<Int>(key: "keyboardLeftInterval", defaultValue: 4)
-    static let keyboardRightInterval = Setting<Int>(key: "keyboardRightInterval", defaultValue: 7)
 
 }

    static let reverbFeedback = Setting<Float>(key: "reverbFeedback", defaultValue: 0.0)
    static let reverbCutoff = Setting<Float>(key: "reverbCutoff", defaultValue: 200.0)
    
    static let vibratoWaveform = Setting<Float>(key: "vibratoWaveform", defaultValue: AKLowFrequencyOscillator.waveformTypeForSine().value)
    static let vibratoDepth = Setting<Float>(key: "vibratoDepth", defaultValue: 0.0)
    static let vibratoFrequency = Setting<Float>(key: "vibratoFrequency", defaultValue: 0.0)


struct Settings {
    
    static let phonemeboardSustain = Setting<Bool>(key: "phonemeboardSustain", defaultValue: false)
    static let keyboardSustain = Setting<Bool>(key: "keyboardSustain", defaultValue: false)
    
    static let formantsFrequency = Setting<Float>(key: "formantsFrequency", defaultValue: 1.0)
    static let formantsBandwidth = Setting<Float>(key: "formantsBandwidth", defaultValue: 1.0)
