No speech detected in SwiftUI iOS

Question

I am trying to implement a speech-to-text feature in my app but I am facing this error:

Recognition error:  Error Domain=kAFAssistantErrorDomain Code=1110 "No speech detected"

I am testing it on a real device

Relevant code:

@State private var isRecording = false {
    didSet {
        if !isRecording { recognitionTask = nil }
    }
}

@State private var recognitionTask: SFSpeechRecognitionTask?

private func startRecording() {
    isRecording = true
    let speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "en-US"))!
    
    // Create an SFSpeechAudioBufferRecognitionRequest instance
    let request = SFSpeechAudioBufferRecognitionRequest()
    let audioEngine = AVAudioEngine()
    let inputNode = audioEngine.inputNode
    
    // Append audio samples to the request object
    inputNode.installTap(onBus: 0, bufferSize: 1024, format: inputNode.outputFormat(forBus: 0)) { (buffer, time) in
        request.append(buffer)
    }
    
    // Start the audio engine and start recording
    audioEngine.prepare()
    do {
        try audioEngine.start()
    } catch {
        print("Audio engine error: ",error)
        return
    }
    
    // Start recognizing speech from the audio samples
    recognitionTask = speechRecognizer.recognitionTask(with: request) { (result, error) in
        // Check for errors
        if let error {
            print("Recognition error: ",error)
            return
        }
        guard let result else { return }
        // Update the task variable with the transcription result
        self.task = result.bestTranscription.formattedString
    }
}

private func stopRecording() {
    recognitionTask?.cancel()
    isRecording = false
}

and then I have 2 buttons to indicate if it's recording or not and also to trigger the stopRecording() function and the startRecording() function. Here's the snippet:

if isRecording {
    Button {
        stopRecording()
    } label: {
        Image(systemName: "mic.circle.fill")
            .resizable()
            .frame(width: 25, height: 25)
            .foregroundColor(.red)
    }
} else {
    Button {
        startRecording()
    } label: {
        Image(systemName: "mic.circle.fill")
            .resizable()
            .frame(width: 25, height: 25)
    }
}

Why do I get this error?

No speech detected in SwiftUI iOS

0 Answers0