How to fix "Synthesizer not found" and "invalid meta event" ?

[ghopretz]

My Code in Android Studio is:

	try {
		Synthesizer synthesizer = MidiSystem.getSynthesizer();
		synthesizer.open();
		synthesizer.unloadAllInstruments(synthesizer.getDefaultSoundbank());
synthesizer.loadAllInstruments(MidiSystem.getSoundbank(getAssets().open("SmallTimGM6mb.sf2")));

		Sequencer sequencer = MidiSystem.getSequencer(false);
		sequencer.open();
		sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());

		InputStream inputStream = new BufferedInputStream(getAssets().open("lagu.mid"));
		sequencer.setSequence(inputStream);
		sequencer.start();
		Toast.makeText(this, "play", Toast.LENGTH_SHORT).show();
	} catch (Exception e) {
		Toast.makeText(this, "error "+e.toString(), Toast.LENGTH_SHORT).show();
	}

[liuyubupt]

Have you solved your problem, I have a problem similar to yours.
the same code ' Synthesizer synthesizer = MidiSystem.getSynthesizer(); ', but the synthesizer is null.
and when i use 'sequencer.start()', there is no sound.

[bmaupin]

MidiSystem.getSynthesizer()

This library appears to be a port of javax.sound.midi, which I don't believe includes a synthesizer.

Someone else has ported the synthesizer from com.sun.media.sound, which also conveniently bundles this library: https://github.com/KyoSherlock/MidiDriver

It also bundles a sample app which shows you how to use it: https://github.com/KyoSherlock/MidiDriver/blob/master/sample/src/main/java/cn/sherlock/midi/sample/MainActivity.java

I have an updated fork of that project here in case it helps: https://github.com/bmaupin/MidiDriver