Sound, Music, and Video: MMAPI - Beginning J2ME: From Novice to Professional - page 313

• Reusable blocks of tones can be defined. To begin a block definition, use

ToneControl.BLOCK_START and supply a block number. Then supply the notes and durations
that go into the block. To end a block definition, use ToneControl.BLOCK_END and supply
the same block number. To actually play a block, use ToneControl.PLAY_BLOCK and
supply the number of the block you wish to play. Blocks must be defined following the
VERSION , TEMPO , and RESOLUTION in a sequence.

• The volume can be set at any time during a sequence for dramatic dynamic effects. For

example, ToneControl.SET_VOLUME, 25 sets the volume to one quarter of its maximum value.

• To indicate a rest of a certain duration, use the special note value ToneControl.SILENCE .

You can repeat a single note multiple times. For example, ToneControl.REPEAT, 7, 60, 16
plays middle C (60) seven times with a duration of 16.

•

The MIDlet in Listing 16-4 contains several examples that will help you write your own
tone sequences.

Listing 16-4. Old Classics in Monophonic Glory

import java.io.*;

import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;

public class ToneMIDlet
extends MIDlet
implements CommandListener {
private final static String kSoundOfMusic = "Sound of Music";
private final static String kQuandoMenVo = "Quando men vo";
private final static String kTwinkle = "Twinkle number VII";

private Display mDisplay;
private List mMainScreen;

public void startApp() {
mDisplay = Display.getDisplay(this);

if (mMainScreen == null) {
mMainScreen = new List("AudioMIDlet", List.IMPLICIT);