Question

我试图从Siri Kit中运行文本到语音（AVSpeechSynthesizer）以及语音到文本，但我一直坚持下去。

我的TTS工作正常，直到我运行代码执行STT，之后我的TTS不再工作了。我调试了代码并在执行代码期间没有发生错误，但是我的文本没有转换为语音。我想我的STT在某种程度上禁用了输出麦克风，这就是为什么TTS不再将文本转换为语音的原因，嗯，这只是一个理论。 Ops：我的TTS停止工作，但我的STT工作正常

任何提示？

这是我的viewController的代码：

@IBOutlet weak var microphoneButton: UIButton!

//text to speech
let speechSynthesizer = AVSpeechSynthesizer()

//speech to text
private var speechRecognizer: SFSpeechRecognizer!

private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private var recognitionTask: SFSpeechRecognitionTask?
private var audioEngine = AVAudioEngine()

@IBAction func textToSpeech(_ sender: Any) {

    if let word = wordTextField.text{

        if !speechSynthesizer.isSpeaking {


            //get current dictionary
            let dictionary = fetchSelectedDictionary()

            //get current language
            let language = languagesWithCodes[(dictionary?.language)!]

            let speechUtterance = AVSpeechUtterance(string: word)
                speechUtterance.voice = AVSpeechSynthesisVoice(language: language)
                speechUtterance.rate = 0.4
             //speechUtterance.pitchMultiplier = pitch
             //speechUtterance.volume = volume
                speechSynthesizer.speak(speechUtterance)

        }
        else{
            speechSynthesizer.continueSpeaking()
        }

    }
}

@IBAction func speechToText(_ sender: Any) {

    if audioEngine.isRunning {
        audioEngine.stop()
        recognitionRequest?.endAudio()
        microphoneButton.isEnabled = false
        microphoneButton.setTitle("Start Recording", for: .normal)
    } else {
        startRecording()
        microphoneButton.setTitle("Stop Recording", for: .normal)
    }

}

func startRecording() {

    if recognitionTask != nil {
        recognitionTask?.cancel()
        recognitionTask = nil
    }

    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setCategory(AVAudioSessionCategoryRecord)
        try audioSession.setMode(AVAudioSessionModeMeasurement)
        try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
    } catch {
        print("audioSession properties weren't set because of an error.")
    }

    recognitionRequest = SFSpeechAudioBufferRecognitionRequest()

    guard let inputNode = audioEngine.inputNode else {
        fatalError("Audio engine has no input node")
    }

    guard let recognitionRequest = recognitionRequest else {
        fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
    }

    recognitionRequest.shouldReportPartialResults = true

    recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in

        var isFinal = false

        if result != nil {

            self.wordTextField.text = result?.bestTranscription.formattedString
            isFinal = (result?.isFinal)!
        }

        if error != nil || isFinal {
            self.audioEngine.stop()
            inputNode.removeTap(onBus: 0)

            self.recognitionRequest = nil
            self.recognitionTask = nil

            self.microphoneButton.isEnabled = true
        }
    })

    let recordingFormat = inputNode.outputFormat(forBus: 0)
    inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
        self.recognitionRequest?.append(buffer)
    }

    audioEngine.prepare()

    do {
        try audioEngine.start()
    } catch {
        print("audioEngine couldn't start because of an error.")
    }

    wordTextField.text = "Say something, I'm listening!"
}

}

Answer 1

可能是因为您的音频处于录音模式，您有两个解决方案，首先是将您的尝试audioSession.setCategory（AVAudioSessionCategoryRecord）设置为AVAudioSessionCategoryPlayAndRecord（这将起作用），但更简洁的方法是获得一个单独的功能来说的东西然后将你的AVAudioSessionCategory设置为AVAudioSessionCategoryPlayback

希望这会有所帮助。

Answer 2

这一行：

try audioSession.setMode(AVAudioSessionModeMeasurement)

可能是原因。它可能导致音量被限制得如此之低，以至于它听起来像是关闭的。尝试：

try audioSession.setMode(AVAudioSessionModeDefault)

看看它是否有效。

Siri Kit（语音到文本）禁用我的TTS（文本到语音）iOS

2 个答案: