Opening instruments with appletviewer vs. browser

[Momo]

A Java program that I've written that makes sounds works fine when I
test it with appletviewer, but not when I use a browser (Firefox or
Explorer). The difference is that when I call the MidiSystem
synthesizer with getAvailableInstruments, I get a bunch of instruments
(411) when running it with appletviewer, but none when using a browser.
Why the difference? A short program that demonstrates my problem is
below.

Momo


import javax.swing.*;
import javax.sound.midi.*;

public class SimpleSound extends JApplet
{
public void init()
{
try {
Synthesizer synth=MidiSystem.getSynthesizer();
synth.open();
Instrument[] instr=synth.getAvailableInstruments();
JOptionPane.showMessageDialog(null,"instr.length="+instr.length);
}
catch (MidiUnavailableException e) {
}
}
}

 

[Andrew Thompson]

A Java ..

Please cross-post rather than multi-post, in future.

(X-post to c.l.j.h./p., w/f-u to c.l.j.h. only)

Andrew T.

 

[christopher]

try doing something with your exception rather than throwing it away.

 

[Momo]

This is just a test program to demonstrate the error. When I run the
program below it doesn't throw an exception, it runs through the first
part and then tells me that there are 0 instruments available.

Momo

try doing something with your exception rather than throwing it away.

A Java program that I've written that makes sounds works fine when I
test it with appletviewer, but not when I use a browser (Firefox or
Explorer). The difference is that when I call the MidiSystem
synthesizer with getAvailableInstruments, I get a bunch of instruments
(411) when running it with appletviewer, but none when using a browser.
Why the difference? A short program that demonstrates my problem is
below.

import javax.swing.*;
import javax.sound.midi.*;

public class SimpleSound extends JApplet
{
public void init()
{
try {
Synthesizer synth=MidiSystem.getSynthesizer();
synth.open();
Instrument[] instr=synth.getAvailableInstruments();
JOptionPane.showMessageDialog(null,"instr.length="+instr.length);
}
catch (MidiUnavailableException e) {
}
}

}

 

[mic1]

similar issue

I had a similar issue building an executable jar file. The application would find the MIDI instruments when running to Eclipse, but would return instruments of zero length when running outside of Eclipse.

It turned out that the two applications were running ot two different installed versions of the JRE. One of the versions of the JRE came without a default synthesizer sound bank. The file soundbank.gm was missing from the lib/audio folder.