我可以用耳机听到反馈来录音，这很好
但是如果我尝试使用内置麦克风，我会听到大声的尖叫声（显然）
如何将我的代码配置为：
我在某处读到我需要使用 booster.gain = 0 或类似的东西，但音频套件根本没有任何助推器。
现在 gpt 告诉我需要更新或绕过我的混音器，但这不起作用 困惑 ai 告诉我，我需要将混音器的音量设置为零，但这也不起作用。
所以我在这里对我失败的人工智能感到谦卑，向audiokit社区询问......如果使用我的内部麦克风，我怎样才能停止反馈？ （我不需要听到自己的声音）
import AudioKit
import AVFoundation
class Conductor {
static let sharedInstance = Conductor()
// Instantiate the audio engine and Mic Input node objects
let engine = AudioEngine()
var mic: AudioEngine.InputNode!
// Add effects for the Mic Input.
var delay: Delay!
var reverb: Reverb!
let mixer = Mixer()
var recorder: NodeRecorder!
// MARK: Initialize the audio engine settings.
init() {
do {
Settings.bufferLength = .medium //short //veryshort
try AVAudioSession.sharedInstance().setPreferredIOBufferDuration(Settings.bufferLength.duration)
try AVAudioSession.sharedInstance().setCategory(.playAndRecord,
options: [.defaultToSpeaker, .mixWithOthers, .allowBluetoothA2DP])
try AVAudioSession.sharedInstance().setActive(true)
} catch let err {
print(err)
}
// The audio signal path with be:
// input > mic > delay > reverb > mixer > output
// Mic is connected to the audio engine's input...
mic = engine.input
// Mic goes into the delay...
delay = Delay(mic)
delay.time = AUValue(0.3)
delay.feedback = AUValue(7.0)
delay.dryWetMix = AUValue(7.0)
// Delay output goes into the reverb...
reverb = Reverb(delay)
reverb.loadFactoryPreset(.mediumRoom)
reverb.dryWetMix = AUValue(0.4)
// Reverb output goes into the mixer...
mixer.addInput(reverb)
// Engine output is connected to the mixer.
engine.output = mixer
// Uncomment the following method, if you don't want to Start and stop the audio engine via the SceneDelegate.
startAudioEngine()
}
// MARK: Start and stop the audio engine via the SceneDelegate
func startAudioEngine() {
do {
print("Audio engine was started.")
try engine.start()
} catch {
Log("AudioKit did not start! \(error)")
}
}
func prepareToRecord() {
updateMixerStatus() // Update mixer status before recording
//only the first time
if !engine.avEngine.isRunning {
do {
print("Audio engine was started.")
try engine.start()
} catch {
Log("AudioKit did not start! \(error)")
}
}
//this was old code in the prev implementation
do {
recorder = try NodeRecorder(node: mixer, shouldCleanupRecordings: true)
} catch {
print("error to start recording")
}
}
// Method to enable/disable mixer based on mic usage
// func updateMixerStatus() {
// if isUsingInternalMic() {
// // Bypass or disable the mixer when using internal mic
// mixer.volume = 0 // or use mixer.isBypassed = true if available
// } else {
// // Enable the mixer when not using internal mic
// mixer.volume = 1 // or use mixer.isBypassed = false if available
// }
// }
func updateMixerStatus() {
if isUsingInternalMic() {
// Bypass or disable the mixer when using internal mic
// Check if bypass is supported, if not, set the engine's output to reverb
engine.output = reverb
} else {
// Enable the mixer when not using internal mic
engine.output = mixer
}
}
func isUsingInternalMic() -> Bool {
let route = AVAudioSession.sharedInstance().currentRoute
return route.inputs.contains { $0.portType == .builtInMic }
}
func startRecording() {
do {
try recorder.record()
} catch {
print("Error starting recording: \(error)")
}
}
func stopRecording() {
recorder.stop()
if let mainMixerNode = Conductor.sharedInstance.engine.mainMixerNode {
mainMixerNode.removeInput(Conductor.sharedInstance.reverb)
mainMixerNode.removeInput(Conductor.sharedInstance.delay)
}
}
func stopAudioEngine() {
engine.stop()
print("Audio engine was stopped.")
}
}
为了防止使用内部麦克风时出现反馈，您可以更新 Conductor 类中的 updateMixerStatus() 方法，如下所示：
func updateMixerStatus() {
if isUsingInternalMic() {
// Bypass or disable the mixer when using internal mic
// Check if bypass is supported, if not, set the engine's output to reverb
engine.output = reverb
} else {
// Enable the mixer when not using internal mic
engine.output = mixer
}
}
此修改可确保当检测到内部麦克风时，引擎的输出设置为混响而不是混音器。这样，您可以防止内部麦克风馈入混音器，这应该有助于消除反馈问题。请记住在录制之前调用 updateMixerStatus() 以根据所使用的麦克风更新混音器状态。