我想用SWIFT中的AudioKit做一个简单的"录制用户的麦克风--应用效果--保存到wav文件"链.
以下是我正在try 使用的代码.相反,我得到的是通过耳机(应用了音调效果)听到输出,但输出文件是空的.我做错了什么?
import AudioKit
import AVFoundation
import SoundpipeAudioKit
class AudioRecorder: ObservableObject {
let engine = AudioEngine()
var recoder: NodeRecorder?
private(set) lazy var outputFileURL: URL = {
let documentsPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
return documentsPath.appendingPathComponent("recording.wav")
}()
func startRecording() {
do {
try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .default, options: [.defaultToSpeaker])
try AVAudioSession.sharedInstance().setActive(true)
} catch {
print("Failed to set up recording session.")
return
}
guard let input = engine.input else {
print("No audio input found")
return
}
do {
recorder = try NodeRecorder(node: input, fileDirectoryURL: outputFileURL)
} catch let err {
fatalError("\(err)")
}
let pitchShifter = PitchShifter(input)
engine.output = pitchShifter
do {
try engine.start()
} catch {
print("Unable to start audio engine: \(error.localizedDescription)")
return
}
}
func stopRecording() {
engine.stop()
do {
try AVAudioSession.sharedInstance().setActive(false)
} catch {
print("Failed to stop recording session.")
}
}
}