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Are you curious on how to make spectrum analysers in Java? Well the below tutorials plus the above code are the solution .

Java Audio Tutorials and API's by GOXR3PLUS STUDIO

Spectrum Analyzers
Java multiple audio formats player
- Java-stream-player
Speech Recognition/Translation/Synthenizers

Example Usage ( Hey check here ):

import javafx.application.Application;
import javafx.scene.Cursor;
import javafx.scene.Scene;
import javafx.stage.Stage;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Main extends Application {

	PlayerExample playerExample = new PlayerExample();

	@Override
	public void start(Stage primaryStage) {
		try {

			// Scene
			Scene scene = new Scene(playerExample, 600, 600);
			scene.setCursor(Cursor.HAND);
			primaryStage.setScene(scene);

			// Show
			primaryStage.setOnCloseRequest(c -> System.exit(0));
			primaryStage.show();

			// Selection of song to play
			JFileChooser jFileChooser = new JFileChooser();
			jFileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
			jFileChooser.setFileFilter(new FileNameExtensionFilter("audio","mp3","wav"));
			jFileChooser.setAcceptAllFileFilterUsed(false);

			while(true){
				if(jFileChooser.showOpenDialog(null)==JFileChooser.APPROVE_OPTION){
					playerExample.playSong(jFileChooser.getSelectedFile());
					break;
				} else{
					JOptionPane.showMessageDialog(null,"Please choose audio file","Select audio",
							JOptionPane.INFORMATION_MESSAGE);
				}
			}

		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	public static void main(String[] args) {
		launch(args);
	}
}