Text To Speech GIST is for what it says

TextToSpeech.swift

protocol TextToSpeechDelegate {
    func speechDidFinish()
}

class TextToSpeech: NSObject, AVSpeechSynthesizerDelegate {
    // Creating Singlton
    static let sharedInstance = TextToSpeech()
    private override init() {
        super.init()
        voiceToUse = AVSpeechSynthesisVoice.speechVoices().filter({ $0.name == "Karen" }).first
        self.voiceSynth.delegate = self
    }

    // Variables for Converting Text to speech
    let voices = AVSpeechSynthesisVoice.speechVoices()
    let voiceSynth = AVSpeechSynthesizer()
    var voiceToUse: AVSpeechSynthesisVoice?
    var delegateTextToSpeech: TextToSpeechDelegate!

    func convertTextToSpeech(_ text: String) {
        let avAudioSession = AVAudioSession.sharedInstance()
        do {
            try avAudioSession.setCategory(AVAudioSessionCategoryPlayback)
            try avAudioSession.setMode(AVAudioSessionModeMoviePlayback)
        } catch {
            print("Audio Session is not active")
        }
        let utterance = AVSpeechUtterance(string: text)
        utterance.voice = voiceToUse
        utterance.rate = 0.6
        voiceSynth.speak(utterance)
    }

    func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {
        self.delegateTextToSpeech.speechDidFinish()
    }
}

I am converting text to speech and playing it on the Car's bluetooth speaker. But when it plays on the car's bluetooth , the car's bluetooth screen show that it initiated the call on the self number. If the iPhone do not contains the SIM card it starts showing the timer. iPhone has no sign of calling being initiated.

I am using following code to play the text in car's bluetooth :

let audioSession = AVAudioSession.sharedInstance()
try? audioSession.setCategory(AVAudioSession.Category.playAndRecord, mode: AVAudioSession.Mode.default, options: [.defaultToSpeaker, .allowBluetooth,.allowBluetoothA2DP])
do {
try audioSession.setActive(true, options: .notifyOthersOnDeactivation)
} catch {
print("Error in the session")
}

let utterance = AVSpeechUtterance(string: text)
utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
synth.speak(utterance)
synth.continueSpeaking()

I tried using only . allowBluetoothA2DP but audio cannot be heard in Bluetooth speaker when I am doing this

try with AVAudioSessionCategoryPlayback.

I tried with the same but with AVAudioSessionCategoryPlayback, Its not playing on Bluetooth Speaker. Means the audio is not heard on the bluetooth speaker. I tried using . allowBluetoothA2DP only but the same behavior i.e the audio is not being heard on the Bluetooth speaker