Question

I am having a problem With AsyncTask as executeOnExecutor() for parallel execution, but I am getting voice with delay (400 ms to 600 ms) when sending and receiving audio. Here is my code:

The code for recording audio call:

private void startRecording() { 
    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
    RECORDER_SAMPLERATE, RECORDER_CHANNELS,
    RECORDER_AUDIO_ENCODING, BufferElements * BytesPerElement); 
    recorder.startRecording();
    isRecording = true;
    /*
     * Schedule a task for repeated fixed-rate execution after a specific
     * delay has passed.
     */
    timer.scheduleAtFixedRate(new TimerTask() {

            @Override
            public void run() {
                bData = new short[BufferElements];

                while (isRecording) {
                // gets the voice output from microphone to byte format
                /*
                 * Reads audio data from the audio hardware for recording
                 * into a buffer.
                 */
                recorder.read(bData, 0, BufferElements);
                if (AudioRecord.ERROR_INVALID_OPERATION != 0) {
                    /* Send the audio voice data to server */
                    SendAudio();
                }
            }}, 0, 1);
}

When making call between two users, firstly initiate call take place as shown in figure.

——>> Calling from user 1 to user 2 Initiate call = 0

If user2 receives call, Initiate call = 1 <<——

If initiate call = 1, transfer data between two users i.e. sending and receiving voice data.

——>> When Initiate call = 1, Transfer data

Sending and receiving voice data <<——

What is the problem in playing audio data?

Getting delay in voice while playing the audio. Time between sending & receiving response is too much, approximately 400 ms to 600 ms. What do I need to do to solve this problem? Holding 5 chunks of data for the first time, when it receives the 5 audio data starts playing immediately one after the other, as shown in code above.

Answer 1

Try to reduce the 5 audio data to 3? – not always the best idea, but it could help.
How is the bandwidth, is enough for transfer comfortably?
how is the network latency? do a ping , if there is a 400ms, than ofc you can’t do much.