FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

EXTRA RELEVANT SYSTEM CONFIGURATION :
I have following midi devices installed:
  - Soundblaster Audigy 2 Platinum
  - ESI M8U (http://www.esi-pro.com/viewProduct.php?pid=20&page=1)
  - Midi Yoke (http://www.midiox.com/myoke.htm)

A DESCRIPTION OF THE PROBLEM :
MidiSystem.getMidiDeviceInfo() produces incomplete list of devices attached to my computer: ESI-M8U midi interface has 8 inputs and 8 outputs, however I can only see 7 inputs and 3 outputs.

I tried to uninstall MidiYoke to see whether it was causing any kinds of conflicts, which resulted in few more but not all devices appearing (one more input and one more output).

I have also verified it's not about drivers or hardware, as other (non-Java) applications can correctly see all the devices, and everything works perfectly under Linux (debian unstable, with vanilla 2.6.9 kernel, same jvm version but Linux-IA32 build).

I have included a code snippet which lists all midi devices in the system. Here's the output of the program with my computer (with midi-yoke installed):

0 MIDI Yoke NT: 1
* description: No details available
* vendor: Unknown vendor

1 MIDI Yoke NT: 2
* description: No details available
* vendor: Unknown vendor

2 MIDI Yoke NT: 3
* description: No details available
* vendor: Unknown vendor

3 MIDI Yoke NT: 4
* description: No details available
* vendor: Unknown vendor

4 MIDI Yoke NT: 5
* description: No details available
* vendor: Unknown vendor

5 MIDI Yoke NT: 6
* description: No details available
* vendor: Unknown vendor

6 MIDI Yoke NT: 7
* description: No details available
* vendor: Unknown vendor

7 MIDI Yoke NT: 8
* description: No details available
* vendor: Unknown vendor

8 SB Audigy MIDI Port [E800]
* description: No details available
* vendor: Unknown vendor

9 SB Audigy MIDI Port II [E800]
* description: No details available
* vendor: Unknown vendor

10 1-M8U MIDI
* description: No details available
* vendor: Unknown vendor

11 2-M8U MIDI
* description: No details available
* vendor: Unknown vendor

12 3-M8U MIDI
* description: No details available
* vendor: Unknown vendor

13 4-M8U MIDI
* description: No details available
* vendor: Unknown vendor

14 5-M8U MIDI
* description: No details available
* vendor: Unknown vendor

15 6-M8U MIDI
* description: No details available
* vendor: Unknown vendor

16 7-M8U MIDI
* description: No details available
* vendor: Unknown vendor

17 Microsoft MIDI Mapper
* description: Windows MIDI_MAPPER
* vendor: Unknown vendor

18 MIDI Yoke NT: 1
* description: External MIDI Port
* vendor: Unknown vendor

19 MIDI Yoke NT: 2
* description: External MIDI Port
* vendor: Unknown vendor

20 MIDI Yoke NT: 3
* description: External MIDI Port
* vendor: Unknown vendor

21 MIDI Yoke NT: 4
* description: External MIDI Port
* vendor: Unknown vendor

22 MIDI Yoke NT: 5
* description: External MIDI Port
* vendor: Unknown vendor

23 MIDI Yoke NT: 6
* description: External MIDI Port
* vendor: Unknown vendor

24 MIDI Yoke NT: 7
* description: External MIDI Port
* vendor: Unknown vendor

25 MIDI Yoke NT: 8
* description: External MIDI Port
* vendor: Unknown vendor

26 SB Audigy Sw Synth [E800]
* description: Internal software synthesizer
* vendor: Unknown vendor

27 SB Audigy Synth A [E800]
* description: No details available
* vendor: Unknown vendor

28 SB Audigy Synth B [E800]
* description: No details available
* vendor: Unknown vendor

29 SB Audigy MIDI Port [E800]
* description: External MIDI Port
* vendor: Unknown vendor

30 SB Audigy MIDI Port II [E800]
* description: External MIDI Port
* vendor: Unknown vendor

31 Microsoft GS Wavetable SW Synth
* description: Internal software synthesizer
* vendor: Unknown vendor

32 1-M8U MIDI
* description: External MIDI Port
* vendor: Unknown vendor

33 2-M8U MIDI
* description: External MIDI Port
* vendor: Unknown vendor

34 3-M8U MIDI
* description: External MIDI Port
* vendor: Unknown vendor

35 Real Time Sequencer
* description: Software sequencer
* vendor: Sun Microsystems

36 Java Sound Synthesizer
* description: Software wavetable synthesizer and receiver
* vendor: Sun Microsystems







REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.sound.midi.*;

public class MidiTest {

  public static void main(String[] args) throws Exception {

    MidiDevice.Info[] infos =
        MidiSystem.getMidiDeviceInfo();

    for (int i = 0; i<infos.length; i++) {
        System.out.println(i+
                "\t"+infos[i].getName()+
                "\n\t* description: "+infos[i].getDescription()+
                "\n\t* vendor: "+infos[i].getVendor()+
                "\n"
                );
    }
  }
}
---------- END SOURCE ----------
###@###.### 2004-12-16 18:00:37 GMT