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java.lang.IllegalArgumentException: Requested device not installed	at javax.sound.midi.MidiSystem.getDefaultDevice(MidiSystem.java:1147)	at javax.sound.midi.MidiSystem.getDefaultDeviceWrapper(MidiSystem.java:1093)	at javax.sound.midi.MidiSystem.getSynthesizer(MidiSystem.java:324)	at test.piano.(piano.java:43)	at test.piano$1.run(piano.java:101)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:602)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)