failed attempt since there is difficulty to seek using mp3

core/src/zero1hd/rhythmbullet/audio/Mp3Manager.java

@@ -39,6 +39,7 @@ public class Mp3Manager implements MusicManager {
 	private Music playbackMusic;
 	private int playbackIndex;
 	
+	private long bitrate;
 	private int sampleRate;
 	private long sampleCount;
 	private double durationInSeconds;
@@ -70,7 +71,7 @@ public class Mp3Manager implements MusicManager {
 				sampleCount = MathUtils.round(Float.valueOf((float) (mp3File.getAudioHeader().getSampleRateAsNumber()*mp3File.getMP3AudioHeader().getPreciseTrackLength()))); 
 				sampleRate = mp3File.getMP3AudioHeader().getSampleRateAsNumber();
 				durationInSeconds = mp3File.getMP3AudioHeader().getPreciseTrackLength();
-
+				bitrate = mp3File.getAudioHeader().getBitRateAsNumber();
 			} catch (IOException | TagException | ReadOnlyFileException | InvalidAudioFrameException e) {
 				e.printStackTrace();
 			}
@@ -102,9 +103,10 @@ public class Mp3Manager implements MusicManager {
 	@Override
 	public void setReadIndexToPlaybackIndex() {
 		try {
-			long pointer = (long) (getPositionInSeconds()*(long)sampleRate)-readWindowSize;
+			long pointer = (long) (getPositionInSeconds()*(bitrate*sampleRate/8f));
 			raf.seek(pointer);
-			readWindowIndex = (int) (pointer/readWindowSize);
+			System.out.println(pointer);
+			readWindowIndex = playbackIndex;
 			currentByteSet = null;
 		} catch (IOException e) {
 			e.printStackTrace();
@@ -206,6 +208,11 @@ public class Mp3Manager implements MusicManager {
 		return sampleRate;
 	}
 	
+	@Override
+	public long getBitrate() {
+		return bitrate;
+	}
+	
 	@Override
 	public int getreadWindowIndex() {
 		return readWindowIndex;

core/src/zero1hd/rhythmbullet/audio/MusicManager.java

@@ -50,6 +50,10 @@ public interface MusicManager extends Disposable {
 	 */
 	public float getSampleRate();
 	
+	/**
+	 * @return the bitrate of the audio.
+	 */
+	public long getBitrate();
 	/**
 	 * The current numerical value of the last window read
 	 * @return
@@ -89,6 +93,7 @@ public interface MusicManager extends Disposable {
 	public FileHandle getMusicFile();
 	
 	/**
+	 * Synchronizes reading to current playback.
 	 */
 	public void setReadIndexToPlaybackIndex();
 }

core/src/zero1hd/rhythmbullet/audio/WAVManager.java

@@ -21,11 +21,12 @@ public class WAVManager implements MusicManager {
 	private int playbackIndex;
 	private int readWindowIndex;
 	private Music playbackMusic;
-	WavDecoder decoder;
+	private WavDecoder decoder;
 	private FileHandle file;
 	private String basicSongName;
 	private RandomAccessFile raf;
 	
+	private int sampleSizeInBits;
 	public WAVManager(FileHandle file) {
 		this.file = file;
 		basicSongName = file.name();
@@ -37,7 +38,8 @@ public class WAVManager implements MusicManager {
 			e.printStackTrace();
 		}
 		playbackMusic = Gdx.audio.newMusic(file);
-		format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, (float) decoder.getSampleRate(), 16, decoder.getChannels(), decoder.getChannels()*2, (float) decoder.getSampleRate(), false);
+		format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, (float) decoder.getSampleRate(), decoder.getSampleSizeInBits(), decoder.getChannels(), decoder.getChannels()*2, (float) decoder.getSampleRate(), false);
+		sampleSizeInBits = decoder.getSampleSizeInBits();
 	}
 	
 	@Override
@@ -58,9 +60,9 @@ public class WAVManager implements MusicManager {
 	@Override
 	public void setReadIndexToPlaybackIndex() {
 		try {
-			long pointer = (long) (getPositionInSeconds()*(long)getSampleRate())-readWindowSize;
+			long pointer = (long) (getPositionInSeconds()*(getBitrate()/8f));
 			raf.seek(pointer);
-			readWindowIndex = (int) (pointer/readWindowSize);
+			readWindowIndex = playbackIndex;
 		} catch (IOException e) {
 			e.printStackTrace();
 		}
@@ -157,4 +159,9 @@ public class WAVManager implements MusicManager {
 	public FileHandle getMusicFile() {
 		return file;
 	}
+
+	@Override
+	public long getBitrate() {
+		return (long) (getSampleRate()*sampleSizeInBits);
+	}
 }

core/src/zero1hd/rhythmbullet/audio/wavedecoder/WavDecoder.java

@@ -11,6 +11,7 @@ public class WavDecoder {
 	private int channels;
 	private double sampleRate;
 	private byte[] buffer;
+	private int sampleSize;
 	private AudioInputStream audioInputStream;
 	
 	public WavDecoder(BufferedInputStream inputStream) throws IOException {
@@ -20,6 +21,7 @@ public class WavDecoder {
 			
 			channels = audioInputStream.getFormat().getChannels();
 			sampleRate = audioInputStream.getFormat().getSampleRate();
+			sampleSize = audioInputStream.getFormat().getSampleSizeInBits();
 		} catch (UnsupportedAudioFileException e) {
 			e.printStackTrace();
 		}
@@ -64,6 +66,10 @@ public class WavDecoder {
 		return audioInputStream;
 	}
 	
+	public int getSampleSizeInBits() {
+		return sampleSize;
+	}
+	
 	public void cleanAndClose() {
 		try {
 			audioInputStream.close();

core/src/zero1hd/rhythmbullet/graphics/ui/components/Visualizer.java

@@ -29,7 +29,8 @@ public class Visualizer extends Widget implements Disposable {
 		if (mm != null && mm.isFinishedLoading() && !mmSet) {
 			Gdx.app.debug("Visualizer", "\nsample count: " + mm.getSampleCount()
 			+ "\nDuration in seconds: " + mm.getDuration() + 
-			"\nSample rate: " + mm.getSampleRate());
+			"\nSample rate: " + mm.getSampleRate()
+			+ "\nBit rate: " + mm.getBitrate());
 			vis.setMM(mm);
 			mmSet = true;
 		}