如何使用AVAudioEngine取消或消除回声/重复声音？

import AVFoundation

func removeEchoFromAudio() {
    // 创建AVAudioEngine实例和相关节点
    let audioEngine = AVAudioEngine()
    let audioPlayerNode = AVAudioPlayerNode()
    let audioUnitReverb = AVAudioUnitReverb()

    // 连接节点
    audioEngine.attach(audioPlayerNode)
    audioEngine.attach(audioUnitReverb)
    audioEngine.connect(audioPlayerNode, to: audioUnitReverb, format: nil)
    audioEngine.connect(audioUnitReverb, to: audioEngine.outputNode, format: nil)

    // 设置混响效果
    audioUnitReverb.loadFactoryPreset(.largeHall)
    audioUnitReverb.wetDryMix = 0 // 调整湿度和干燥度

    // 启动AVAudioEngine
    do {
        try audioEngine.start()
    } catch {
        print("Failed to start AVAudioEngine: \(error)")
        return
    }

    // 播放音频
    guard let audioFileURL = Bundle.main.url(forResource: "example", withExtension: "mp3") else {
        print("Audio file not found")
        return
    }

    do {
        let audioFile = try AVAudioFile(forReading: audioFileURL)
        audioPlayerNode.scheduleFile(audioFile, at: nil, completionHandler: nil)
        audioPlayerNode.play()
    } catch {
        print("Failed to play audio: \(error)")
    }
}

// 调用函数进行回声消除
removeEchoFromAudio()