AKPitchShifter generates unexpected "crack" sounds

[Роман Баранов]

Hi!

AKPitchShifter generates unexpected "crack" sounds that becomes obvious with sine wave. Please try this code in iOS Playground:

import XCPlayground

import AudioKit

let volume = AKOperation.sineWave(frequency:0.2).scale(minimum: 0.2, maximum: 0.5)

let minimum = Double(20)

let maximum = Double(400)

let frequency = AKOperation.sineWave(frequency: 0.5).scale(minimum: minimum, maximum: maximum)

let oscillator = AKOperation.sineWave(frequency: frequency, amplitude: volume)

let oscillatorNode = AKOperationGenerator(operation: oscillator)

let pitchShifter = AKPitchShifter(oscillatorNode)

pitchShifter.shift = -400

AudioKit.output = pitchShifter

AudioKit.start()

oscillatorNode.start()

pitchShifter.start()

XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

Is it a bug of AKPitchShifter?

[Aurelius Prochazka Ph.D.]

Yep, the real time pitch shifter is new and _terrible_ because of the crackles.  We're working on implementing a different algorithm.  

Aure

[Aurelius Prochazka Ph.D.]

This should sound better now, no more crackles, in the develop branch.

Aure

[Роман Баранов]

Have just tested it — works much better, thank you!

воскресенье, 12 июня 2016 г., 1:53:59 UTC+6 пользователь Aurelius Prochazka Ph.D. написал: