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POMidiUnavailableException in Java?
 

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    <p>I'm having some trouble playing MIDI files in Java. What I get is a <code>MidiUnavailableException (MIDI OUT transmitter not available)</code> when I try to play it. My code is standard:</p> <pre><code>try { midiseq = MidiSystem.getSequencer(); midiseq.open(); midiseq.setSequence(MidiSystem.getSequence(sound1)); midiseq.setLoopCount(Sequencer.LOOP_CONTINUOUSLY); midiseq.start(); } catch (Exception e) {e.printStackTrace();} </code></pre> <p><code>midiseq</code> is a <code>Sequencer</code>; <code>sound1</code> is an <code>InputStream</code>.</p> <p>This code works on several other computers, and even works in Eclipse and when used in a JAR file, just not when I launch it from the command prompt. I've downloaded a more stable Java midi application, and it threw the same exception.</p> <p>It can't be a hardware problem because Eclipse can run it without problems, neither can it be a coding problem because this runs correctly on other computers. Even this one line of code throws this exception:</p> <pre><code>javax.sound.midi.MidiSystem.getSequencer(); </code></pre> <p>Thanks in advance.</p> <p>edit: My operating system is Windows Vista. Before I asked this question I've downloaded the latest JRE and JDK (1.6.0_13 I think).</p> <p>edit: The code:</p> <pre><code>ClassLoader.getSystemClassLoader().loadClass("com.sun.media.sound.RealTimeSequencer"); System.out.println( "Sequencer class loaded" );// Otherwise ClassNotFoundException </code></pre> <p>prints "Sequencer class loaded."</p> <p>But this code:</p> <pre><code> try{ System.out.println(javax.sound.midi.MidiSystem.getSequencer()); System.exit(0); } catch(Exception e) { throw new RuntimeException(e); } System.exit(1); </code></pre> <p>throws the <code>MidiUnavailableException.</code></p> <p>Also, this code:</p> <pre><code> MidiDevice.Info[] devices = MidiSystem.getMidiDeviceInfo(); if (devices.length == 0) { System.out.println("No MIDI devices found"); } else { for (MidiDevice.Info dev : devices) { System.out.println(dev); } } </code></pre> <p>gives me this:</p> <pre> Microsoft MIDI Mapper Microsoft GS Wavetable Synth Real Time Sequencer Java Sound Synthesizer </pre>
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    1. COJava sound support is so broken... Be thankful you don't have a mac :)
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