Add MIDI Events to Clock - Java

2019-08-18 08:02发布

问题:

I am creating a simple MIDI application in C# with an open source library that allows the user to specify a channel, pitch and velocity and add them to a Clock. This clock can then play all the notes in the sequence that they were added.

Everything works great and now I am in the process of creating a Java version of the application, the only trouble I seem to be having is that I can't find any simple tutorial or explanation of how the clock system works within MIDI Java.

Does the Clock exist in Java Sound Framework or is this something I will have to implement myself?

Thanks!

回答1:

It's been a long time since I've touched the Java Midi stuff, but in general, to programmatically build a MIDI, you need to do the following steps.

Assuming import javax.sound.midi;:

You need to create a Sequencer object:

Sequence seq = new Sequence(Squence.PPQ, 500000);

Next, you need to create a Track object (one per channel or one for everything, it's up to you):
```
Track track = seq.createTrack();
```

Now, you can add events to it:

track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_ON, 0, 60, 127), 0));
track.add(new MidiEvent(new ShortMessage(ShortMessage.NOTE_OFF, 0, 60, 127), 1000));
//etc.