CODEWITHSUNDEEP
iosswiftaudiokit
headkit
headkit

Reputation: 3327

AudioKit: How to switch filter types when using AKOperationEffect?

Lets say I use a moog filter for lowpass like the following, but also wat to switch mode to some highpass filter, too.

class FilterSection: AKNode, AKInput {
...
init(_ input: AKNode) {

    output = AKOperationEffect(input) { input, parameters in

        return input.moogLadderFilter(
            cutoffFrequency: parameters[0],
            resonance: parameters[1]
        )
    }

    super.init()
    self.initFilterParameters()
    output.parameters = parameters
    self.avAudioNode = output.avAudioNode
}
...
}

How could I add the feature to switch between this and another filter type within the same class?

Is it possible, or do I have to use some construct like

    filterSection1 = FilterSection1(generators)
    filterSection2 = FilterSection2(filterSection1)
    filterSection1.output.start()
    filterSection2.output.stop()

and the switch between types like

    filterSection1.output.stop()
    filterSection2.output.start()

which I want to avoid? thnx!

Upvotes: 1

Views: 124

Answers (1)

Aurelius Prochazka
Aurelius Prochazka

Reputation: 4573

You can't switch filter types, but you can run them in parallel, mix them, and then change the mix from one to the other, with the added benefit of being able to blend or morph between the two.

Upvotes: 2

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