Does AudioKit provide a method to calculate interpolated values of discrete array members? Does AudioKit provide a method to smooth transition operation between parameters of an oscillator like baseFrequency, AKOperation.periodicTrigger or hold?
Below the code I use for FM generation:
let oscillator = AKOperation.fmOscillator(baseFrequency: Synth.frequency,
carrierMultiplier: 2,
modulatingMultiplier: 0.8,
modulationIndex: 1,
amplitude: Synth.amplitude.triggeredWithEnvelope(
trigger: AKOperation.periodicTrigger(period: Synth.cyclic),
attack: 0.01,
hold: Synth.hold,
release: 0.01))
For input parameter interpolated values of Frequency Cycle and Duty shall be calculated by interpolation based on the table (array) below:
P1 Freq. Cycle Duty %
-10 200 100 100
-3.04 405 100 100
-0.51 300 500 100
-0.50 200 800 5
0.09 400 600 10
0.10 400 600 50
1.16 550 552 52
2.67 763 483 55
4.24 985 412 58
6.00 1234 322 62
8.00 1517 241 66
10.00 1800 150 70
The transition of values (for Freq., Cycle ans Duty) shall be smoothen based on input parameter P1. Is this what AKComputedParameter e.g. smoothDelay is made for?
How do I tell AudioKit to apply AKComputedParameter?
Do you have a sample code (code snippet) for achievement of interpolation/transition operation with application to oscillator based on the code above? Either based on AK or vDSP methods.
I’m not quiet sure on how to apply https://audiokit.io/docs/Protocols/AKComputedParameter.html
I think this question was downvoted somewhat because it seems like you're asking for too much of an actual implementation with that table of values. I'm going to ignore that and say that however you decide to change the parameters of the oscillator in your app logic, you can make the transitions smooth by portamento'ing the values.
So, in your case for frequency you would replace Synth.frequency with a parameter you set that you would then portamento like AKOperation.parameters[0].portamento(halfTime: 0.5)
See an example for using parameters here: https://audiokit.io/playgrounds/Synthesis/Plucked%20String%20Operation/