前端之家收集整理的这篇文章主要介绍了
使用Swift使用AVAudioEngine进行实时转换，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
我正在使用
Swift在OSX上开发音频
效果应用程序,我对集成音高
效果感兴趣.
我希望能够实时地将音调调高或调高八度.目前我只收到一个干燥的信号.
我不确定这是否可行,并且想知道这是否可行,或者任何人可能有任何帮助或建议.
与该问题相关的当前代码如下：
import Cocoa
import AVFoundation
class ViewController: NSViewController {
var engine = AVAudioEngine()
var timePitch = AVAudioUnitTimePitch()
override func viewDidLoad() {
timePitch.pitch = 1200
// Setup engine and node instances
var mixer = engine.mainMixerNode
var input = engine.inputNode
var output = engine.outputNode
var format = input.inputFormatForBus(0)
var error:NSError?
engine.attachNode(timePitch)
engine.connect(input,to: timePitch,format: format)
engine.connect(timePitch,to: output,format: format)
engine.startAndReturnError(&error)
super.viewDidLoad()
}
override var representedObject: AnyObject? {
didSet {
// Update the view,if already loaded.
}
}
}
@H_
403_10@
timePitch.pitch = -500 //Rude man voice
timePitch.rate = 1.5 //In 1.5 times faster
检查this tutorial.和direct link以示教程中的示例获取更多信息.
Swift 2.0的示例：
import UIKit
import AVFoundation
class ViewController: UIViewController {
var engine: AVAudioEngine!
var player: AVAudioPlayerNode!
var file = AVAudioFile()
override func viewDidLoad() {
super.viewDidLoad()
engine = AVAudioEngine()
player = AVAudioPlayerNode()
player.volume = 1.0
let path = NSBundle.mainBundle().pathForResource("in",ofType: "caf")!
let url = NSURL.fileURLWithPath(path)
let file = try? AVAudioFile(forReading: url)
let buffer = AVAudioPCMBuffer(PCMFormat: file!.processingFormat,frameCapacity: AVAudioFrameCount(file!.length))
do {
try file!.readIntoBuffer(buffer)
} catch _ {
}
let pitch = AVAudioUnitTimePitch()
//
pitch.pitch = -500 //Distortion
pitch.rate = 1.5 //Voice speed
//
engine.attachNode(player)
engine.attachNode(pitch)
engine.connect(player,to: pitch,format: buffer.format)
engine.connect(pitch,to: engine.mainMixerNode,format: buffer.format)
player.scheduleBuffer(buffer,atTime: nil,options: AVAudioPlayerNodeBufferOptions.Loops,completionHandler: nil)
engine.prepare()
do {
try engine.start()
} catch _ {
}
player.play()
}
}
