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pip install -U coremltools

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deactivate

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python --version

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pip install virtualenv
virtualenv --python=/usr/bin/python2.7 python27
source python27/bin/activate

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@IBAction func recordButtonTapped() {
    if (self.recognitionTask?.state == .running) {
        self.recognitionTask?.finish()
        self.recognitionRequest = nil
        self.recordButton.isEnabled = false
    } else {
        try! startRecording()
    }
}

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private func startRecording() throws {
    
    if let recognitionTask = recognitionTask {
        recognitionTask.cancel()
        self.recognitionTask = nil
    }
    let path = Bundle.main.path(forResource: "your-file", ofType: "mp3")
    if let path = path {
        let url = URL(fileURLWithPath: path)
        recognitionRequest = SFSpeechURLRecognitionRequest(url: url)

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private var recognitionRequest: SFSpeechURLRecognitionRequest?

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@IBAction func recordButtonTapped() {
    if audioEngine.isRunning {
        audioEngine.stop()
        recognitionRequest?.endAudio()
        recordButton.isEnabled = false
    } else {
        try! startRecording()
    }
}

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private func startRecording() throws {
        // 1
        if let recognitionTask = self.recognitionTask {
            recognitionTask.cancel()
            self.recognitionTask = nil
        }
        
        // 2
        let audioSession = AVAudioSession.sharedInstance()
        try audioSession.setCategory(AVAudioSessionCategoryRecord)

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private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private let audioEngine = AVAudioEngine()