MIDI device I/O is not working

Name: skT45625 Date: 07/26/2000


java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

When trying to send data to a MIDI device other than the internal java ones
(such as the java sound synthesizer and the java sequencer), although
everything appears to be functioning properly, the MIDI device does not receive
the message. I tested this on many types of devices, including hardware devices
such as a soundcard's synthesizer and its MPU-401, and on virtual devices which
create virtual MIDI ports in the operating system such as Hubi's MIDI Loopback
device v1.5 and a MIDI Monitor program. Here is code that produces the problem:

<pre>
// MidiTest.java
//
// Given as an example of how the javax.sound.midi.* classes do not work on a
// Win98 machine.
//
// by Nicholas Marrone
// July 21, 2000

import javax.sound.midi.*;
import java.lang.Integer;

class MidiTest
{
public static void main(String[] args)
{
MidiDevice.Info[] devices = MidiSystem.getMidiDeviceInfo();

// If incorrect arguments, just print out a list of the
available devices
// and the program's usage
if (args.length != 1) {
System.out.println("Usage:\n\tjava MidiTest [midi
device number]\n");
for (int x = 0; x < devices.length; x++) {
System.out.println("\t"+devices[x]);
}
}
// on the correct arguments, send one note to the specified
midi device
else {
try {
int deviceNum = Integer.parseInt(args[0]);
MidiDevice md = MidiSystem.getMidiDevice(devices
[deviceNum]);
md.open();

// send the message
ShortMessage myMsg = new ShortMessage();
myMsg.setMessage(ShortMessage.NOTE_ON, 0, 60, 93);
long timeStamp = -1;
Receiver r = md.getReceiver();
r.send(myMsg, timeStamp);

// wait for the not to play
for (int x = 0; x < 10000; x++) {
System.out.print("a");
}

md.close();
} catch(Exception e) { System.out.println("Exception
occurred: " + e); }
}
System.exit(0);
}
}
</pre>

The type of soundcard I am using currently which has the problem has an
Interwave chip. I have also tested this on a soundcard with a Crystal chip, and
that soundcard had the same problem.
(Review ID: 107487)
======================================================================