Twilio Send custom Audio bytes using LocalAudioTrack

Question

I am working on Android VoIP Application which uses Twilio Video Conference API.

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Issue:

How to send custom audio bytes recorded from AudioRecord to PSTN ?

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I have already tried one of the example given in Video-Quickstart-Android i.e. ExampleAudioSink.

I am able to send and receive the bytes that are recorded and played by the WebRtcAudioRecord.

What I want is to send my own Custom recorded bytes in realtime via LocalAudioTrack. I have also bypassed the webrtcAudioPlay but can't seem to figure out, how to send my own bytes via LocalAudioTrack.

Here is twilio given workaround;

private void connectToRoom(String roomName) {
        ConnectOptions.Builder connectOptionsBuilder = new ConnectOptions.Builder(accessToken)
                .roomName(roomName);

    if (localAudioTrack != null) {
        connectOptionsBuilder
                .audioTracks(Collections.singletonList(localAudioTrack));
    }

    room = Video.connect(this, connectOptionsBuilder.build(), roomListener());
}


private void createAudioTrack() {
    localAudioTrack = LocalAudioTrack.create(this, false, LOCAL_AUDIO_TRACK_NAME);
}

Here you can see, I have stopped the sending of WebRtcAudioRecord bytes to PSTN by placing false in the second param of LocalAudioTrack.create, but couldn't figure it out how to send my own Data.

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• Note: Please don't suggest me to send my bytes using LocalDataTrack API because LocalDataTrack API is not maintained yet to send bytes to PSTN.

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For reference: video-quickstart-android