Algum tempo estou estudando essa API do Java a Java Sound e estou começando a enrede-la, mas aos poucos vou indo… Estou implementando essa bateria meio tosca mesmo só pra aprender a lidar com ela (API) andei vendo vários exemplos pela internet, mas se alguém puder ajudar, contribuir serei grato.
import javax.sound.midi.*;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.event.*;
import javax.swing.*;
/**
* This program the MIDI percussion channel with a Swing window. It monitors
* keystrokes and mouse motion in the window and uses them to create music.
* Keycodes between 35 and 81, inclusive, generate different percussive sounds.
* See the VK_ constants in java.awt.event.KeyEvent, or just experiment. Mouse
* position controls volume: move the mouse to the right of the window to
* increase the volume.
*/
// http://www.onjava.com/pub/a/onjava/excerpt/jenut3_ch17/index1.html?page=2
public class Drummer extends JFrame {
private static final long serialVersionUID = 1L;
private static JLabel jlbInformations = null;
private static JLabel jlbInstrument = null;
private static JLabel Cymbal = null;
private static JLabel Cymbal01 = null;
private static JLabel Cymbal02 = null;
private static JLabel Cymbal03 = null;
private static JLabel Drum = null;
private static JLabel Drum01 = null;
private static JLabel Drum02 = null;
private static JLabel Drum03 = null;
// The channel we play on: 10 is for percussion
MidiChannel channel;
// Default volume is 50%
int velocity = 64;
public static void main(String[] args) throws MidiUnavailableException {
// We don't need a Sequencer in this example, since we send MIDI
// events directly to the Synthesizer instead.
Synthesizer synthesizer = MidiSystem.getSynthesizer();
synthesizer.open();
JFrame frame = new Drummer(synthesizer);
frame.add(jlbInformations, null);
frame.add(jlbInstrument, null);
frame.add(Cymbal, null);
frame.add(Cymbal01, null);
frame.add(Cymbal02, null);
frame.add(Cymbal03, null);
frame.add(Drum, null);
frame.add(Drum01, null);
frame.add(Drum02, null);
frame.add(Drum03, null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// We use window width as volume control
frame.setSize(800, 600);
// Tamanho fixo do programa, sem alteração
frame.setResizable(false);
// Deixa o programa no meio da tela, centralizado
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private void playCymbal() {
// 120 = Reverse Cymbal
int opcion = 120;
try {
// 60 = C "middle C"; start of 4th octave
int listaNotas = 60;
// Sintetizador midi é obtido
Synthesizer sintetizador = MidiSystem.getSynthesizer();
// Abre o sintetizador para reproduzir sons
sintetizador.open();
// Os canais do sintetizador são obtidos
MidiChannel canales = sintetizador.getChannels()[0];
// Carrega-se o banco de som
Soundbank bancoSonidos = sintetizador.getDefaultSoundbank();
// Carrega-se a lista de som
sintetizador.loadAllInstruments(bancoSonidos);
// Carrega-se os instrumentos
Instrument[] listaInstrumentos = sintetizador
.getLoadedInstruments();
// int upperRange = listaInstrumentos.length - 1;
Instrument instrumento = listaInstrumentos[opcion];
Patch patch = instrumento.getPatch();
canales.programChange(patch.getBank(), patch.getProgram());
canales.noteOn(listaNotas, 100);
canales.allNotesOff();
} catch (Exception exc) {
exc.printStackTrace();
}
}
private void playSnare() {
// 38 = Acoustic Snare
int opcion = 38;
try {
// 60 = C "middle C"; start of 4th octave
int listaNotas = 60;
// Sintetizador midi é obtido
Synthesizer sintetizador = MidiSystem.getSynthesizer();
// Abre o sintetizador para reproduzir sons
sintetizador.open();
// Os canais do sintetizador são obtidos
MidiChannel canales = sintetizador.getChannels()[9];
// Carrega-se o banco de som
Soundbank bancoSonidos = sintetizador.getDefaultSoundbank();
// Carrega-se a lista de som
sintetizador.loadAllInstruments(bancoSonidos);
// Carrega-se os instrumentos
Instrument[] listaInstrumentos = sintetizador
.getLoadedInstruments();
// int upperRange = listaInstrumentos.length - 1;
Instrument instrumento = listaInstrumentos[opcion];
Patch patch = instrumento.getPatch();
canales.programChange(patch.getBank(), patch.getProgram());
canales.noteOn(listaNotas, 100);
canales.allNotesOff();
} catch (Exception exc) {
exc.printStackTrace();
}
}
public Drummer(Synthesizer synth) {
super("Java MIDI Sound Drums - J. Marcos B.");
// Channel 10 is the GeneralMidi percussion channel. In Java code, we
// number channels from 0 and use channel 9 instead.
channel = synth.getChannels()[9];
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if (key >= 35 && key <= 81) {
channel.noteOn(key, velocity);
try {
Synthesizer synth = MidiSystem.getSynthesizer();
Instrument[] instruments = synth.getDefaultSoundbank()
.getInstruments();
// for (int i = 0; i < instruments.length; i++) {
Instrument instrument = instruments[key];
System.out.println(key + " Instrument: "
+ instrument.getName());
jlbInstrument.setText("Instrument: "
+ instrument.getName());
// }
} catch (MidiUnavailableException e1) {
e1.printStackTrace();
}
}
}
public void keyReleased(KeyEvent e) {
int key = e.getKeyCode();
if (key >= 35 && key <= 81)
channel.noteOff(key);
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
velocity = e.getX();
}
});
ImageIcon cymbal = new ImageIcon(getClass().getResource(
"images/Cymbal.png"));
Cymbal = new JLabel(cymbal);
Cymbal.setBounds(new Rectangle(10, 90, 135, 150));
Cymbal.setCursor(new Cursor(Cursor.HAND_CURSOR));
Cymbal.setToolTipText("Cymbal");
Cymbal.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playCymbal();
}
});
ImageIcon cymbal01 = new ImageIcon(getClass().getResource(
"images/Cymbal.png"));
Cymbal01 = new JLabel(cymbal01);
Cymbal01.setBounds(new Rectangle(150, 50, 135, 150));
Cymbal01.setCursor(new Cursor(Cursor.HAND_CURSOR));
Cymbal01.setToolTipText("Cymbal");
Cymbal01.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playCymbal();
}
});
ImageIcon cymbal02 = new ImageIcon(getClass().getResource(
"images/Cymbal.png"));
Cymbal02 = new JLabel(cymbal02);
Cymbal02.setBounds(new Rectangle(450, 50, 135, 150));
Cymbal02.setCursor(new Cursor(Cursor.HAND_CURSOR));
Cymbal02.setToolTipText("Cymbal");
Cymbal02.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playCymbal();
}
});
ImageIcon cymbal03 = new ImageIcon(getClass().getResource(
"images/Cymbal.png"));
Cymbal03 = new JLabel(cymbal03);
Cymbal03.setBounds(new Rectangle(590, 90, 135, 150));
Cymbal03.setCursor(new Cursor(Cursor.HAND_CURSOR));
Cymbal03.setToolTipText("Cymbal");
Cymbal03.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playCymbal();
}
});
// setBounds(coluna , linha , largura , altura );
ImageIcon drum = new ImageIcon(getClass().getResource(
"images/Snare.png"));
Drum = new JLabel(drum);
Drum.setBounds(new Rectangle(245, 50, 135, 150));
Drum.setCursor(new Cursor(Cursor.HAND_CURSOR));
Drum.setToolTipText("Snare");
Drum.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playSnare();
}
});
ImageIcon drum01 = new ImageIcon(getClass().getResource(
"images/Snare.png"));
Drum01 = new JLabel(drum01);
Drum01.setBounds(new Rectangle(245, 165, 135, 150));
Drum01.setCursor(new Cursor(Cursor.HAND_CURSOR));
Drum01.setToolTipText("Snare");
Drum01.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playSnare();
}
});
ImageIcon drum02 = new ImageIcon(getClass().getResource(
"images/Snare.png"));
Drum02 = new JLabel(drum02);
Drum02.setBounds(new Rectangle(365, 50, 135, 150));
Drum02.setCursor(new Cursor(Cursor.HAND_CURSOR));
Drum02.setToolTipText("Snare");
Drum02.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playSnare();
}
});
ImageIcon drum03 = new ImageIcon(getClass().getResource(
"images/Snare.png"));
Drum03 = new JLabel(drum03);
Drum03.setBounds(new Rectangle(245, 265, 135, 150));
Drum03.setCursor(new Cursor(Cursor.HAND_CURSOR));
Drum03.setToolTipText("Snare");
Drum03.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent e) {
playSnare();
}
});
jlbInformations = new JLabel();
jlbInformations.setBounds(new Rectangle(30, 450, 800, 100));
jlbInformations
.setText("<html>This the MIDI percussion channel program to create music generate different percussive sounds. "
+ "<br/>Just an experiment, press the following keys: 1234567890-= qeiopadfghjkl cbnm,.; Right/Left arrow keys, Up/Down arrow keys "
+ "<br/>and move the mouse to the right of the window to increase the volume.</html>");
jlbInstrument = new JLabel();
jlbInstrument.setBounds(new Rectangle(10, 350, 800, 100));
jlbInstrument.setHorizontalAlignment(SwingConstants.CENTER);
jlbInstrument.setFont(new Font("Arial", Font.BOLD, 28));
}
}
Gostei vou fazer mais coisas com ela. Sugestões?
Link para download:
Drummer.jar | 62 KB |
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