ios – Abrupt launch for AmplitudeEnvelope

I’ve made a little bit undertaking the place I play an Oscillator by way of an AmplitudeEnvelope, and what I am searching for is the standard ADSR amplitude curve with a definite assault, maintain and launch half. Nevertheless, I neither hear an assault nor launch a part of the curve. It’s as if it is caught in maintain mode. So as an alternative of a pleasant launch, I get a “pop” or click on sound when the sound is minimize off.

I suppose envelope.cease() isn’t the precise technique to make a launch occur, however what’s? And what’s the proper technique to begin the envelope so I can hear an assault?

The code is mainly like so:

    let engine = AudioEngine()
    var oscillator: Oscillator!
    var envelope: AmplitudeEnvelope!

    init() {
        oscillator = Oscillator(waveform: Desk(.sine))
        oscillator.frequency = 415
        oscillator.amplitude = 0.5

        envelope = AmplitudeEnvelope(oscillator)
        envelope.attackDuration = 0.1
        envelope.decayDuration = 0.3
        envelope.sustainLevel = 0.7
        envelope.releaseDuration = 0.6

        engine.output = envelope

        strive? engine.begin()
        oscillator.begin()
        startTriggerTimer()
    }

    func startTriggerTimer() {
        envelope.begin()

        // Schedule launch after 3 seconds
        DispatchQueue.primary.asyncAfter(deadline: .now() + 3.0) { [weak self] in
            self?.envelope.cease()
            print("Releasing oscillator")
        }
        
        // Set off each 5 seconds
        timer = Timer.scheduledTimer(withTimeInterval: 5.0, repeats: true) { [weak self] _ in
            self?.startTriggerTimer()
        }
    }

That is with AudioKit 5.6.5