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jamiebullock/LiveAudioProcessing.swift

Created June 19, 2014 07:45
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Live coding audio with Swift Playgrounds
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LiveAudioProcessing.swift
import Cocoa
import AVFoundation
// Setup engine and node instances
var engine = AVAudioEngine()
var delay = AVAudioUnitDelay()
var reverb = AVAudioUnitReverb()
var mixer = engine.mainMixerNode
var input = engine.inputNode
var output = engine.outputNode
var format = input.inputFormatForBus(0)
var error:NSError?
// Attach FX nodes to engine
engine.attachNode(delay)
engine.attachNode(reverb)
// Connect nodes
engine.connect(input, to: delay, format: format)
engine.connect(delay, to: reverb, format: format)
engine.connect(reverb, to: output, format: format)
// Start engine
engine.startAndReturnError(&error)
// Change FX parameters
delay.delayTime = 1.0
delay.feedback = 80
// Keep playground running
import XCPlayground
XCPSetExecutionShouldContinueIndefinitely(continueIndefinitely: true)
@kirlen
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kirlen commented Jun 27, 2014

Hi. I get the console output below when I enter your example into a new Playground.

Playground execution failed: error: error: Couldn't lookup symbols:

OBJC_CLASS$_AVAudioMixerNode
OBJC_CLASS$_AVAudioUnitDelay
OBJC_CLASS$_AVAudioNode
OBJC_CLASS$_AVAudioFormat
OBJC_CLASS$_AVAudioUnitReverb
OBJC_CLASS$_AVAudioEngine
OBJC_CLASS$_AVAudioOutputNode
OBJC_CLASS$_AVAudioInputNode

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