CODEWITHSUNDEEP
androidaudiorecordaudiotrack
james
james

Reputation: 1035

just hearing clicking noise on audiotrack playback

I'm trying to record sound from the mic and then play it back, but all I here is a clicking sound. Both of the AudioTrack and AudioRecord are on the same settings, and initalised correctly. Here is my code:

    stop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            isRecording = false;
            recordingThread.join();


            player = findAudioTrack();
            player.play();

            for (int i = 0; i < audioQueue.size(); i++) {
                int written = player.write(audioQueue.get(i), 0,
                        audioQueue.get(i).length);
            }

            player.stop();
            player.release();
            player = null;
        }
    });
}

private void startRecording() {

    recorder = findAudioRecord();

    recorder.startRecording();
    isRecording = true;
    recordingThread = new Thread(new Runnable() {
        public void run() {
            addAudioToQueue();
        }
    }, "AudioRecorder Thread");
    recordingThread.start();
}

private void addAudioToQueue() {
    short[] capturedAudio = new short[recordBufferSize/2];
    while (isRecording) {
        int read = recorder.read(capturedAudio, 0, capturedAudio.length);
        audioQueue.add(capturedAudio);
    }
    recorder.stop();
    recorder.release();
    recorder = null;
}

}

Does anyone know why this is?

Here is the full source code: https://www.dropbox.com/s/h38cs9vjkztyyro/AudioTesting.java

Upvotes: 1

Views: 1736

Answers (1)

David Freitag
David Freitag

Reputation: 2272

It probably has to do with the fact that you are using a short array instead of a byte array.

public int read (byte[] audioData, int offsetInBytes, int sizeInBytes)

It's likely that this function is only filling the first byte of each short so you are left with half of each index being 1 byte of audio data, and the other byte being junk or zeroes.

Try using a byte array instead of short.

Upvotes: 1

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