As per this topic, I've just made a small update to the library. Now, when themidibus receives a NoteOn with zero velocity, it automatically converts it to a NoteOff with the same pitch and velocity.

These two MIDI messages are used interchangeably in the MDI specification (as far as I know), but in terms of programming I think it's much easy to only receive NoteOffs.

Please take a minute to update your libraries.

Sparky

no, here you can send noteoff whenever you like. this is good and simple to use library.

Hey TM,

Yes, my library does do what you want. Making this kind of thing easy is the reason I wrote an alternative to proMidi ... here is a simple example of how to do it:

Code:

import themidibus.*; //Import themidibus

MidiBus myBus; //Your MidiBus object

void setup() {
    size(200,200);
    background(0);

    myBus = new MidiBus(this, "", "Java Sound Synthesizer"); 
    //Initialize your MidiBus Object
}

void draw() {
    int channel = 0;
    int pitch = 64;
    int velocity = 100;

    myBus.sendNoteOn(channel, pitch, velocity); // Send a Midi noteOn.
    //This will play until you send a noteOff with the same channel/pitch
    
    delay(500); //Let's wait 0.5 sec and listen to the beautiful piano
    
    myBus.sendNoteOff(channel, pitch, velocity); 
    // Ok, let's stop it now. Send a Midi noteOff
    
    delay(2000); //Now let's wait 2 sec before we start again
}
 

If you want to learn more about what my library can do, what feature it has and how to use them, you should visit the javadocs. In particular have a look at the PApplet page and the MidiBus page. And obviously, if you have any question about how to use the library, just post here and I'll be happy to help out.

Also just for your information (and in the interest of full disclosure): as you mentioned it is possible to send note on commands with proMidi, but it's not very well documented. This topic briefly explains how.

Hi
I'm doing a project where I'm reading values from an accelerometer with an Arduino board, then sending the values to Processing and then i would like to convert the values to Midi and send them to Logic Pro.
Is it possible to use TheMidiBus library to convert these values to a Midi signal? And is it possible to make Processing behave as a Midi-input device so Logic Pro can recognize it?
I have never worked with Midi before so excuse me if I'm asking for something obvious.
Best regards

Yes you can absolutely do what you're talking about.

(Although you should probably redownload my library after last night's update so we're using the same version, sorry for the inconvenience)

First of all, to make Processing behave like a MIDI-input device in Logic. I'm going to assume we're on mac here, because logic doesn't exist on PC as far as I know. You'll want to set up an IAC bus on your mac. This is essentially a software MIDI bridge that will let you share MIDI from Processing to Logic. For this, open up the "Audio MIDI Setup" Application (under Application/Utilities). Click on "MIDI Devices", then click on "IAC Driver". Make sure the device is online (there should be a check box) and make sure there is at least one port in the list of ports (if not just click add port and make a new one). You should now have (at least) one IAC bus to send MIDI over. You can google IAC bus for more information about the IAC driver.

I will assume for my example that your IAC port was called "Bus 1" like mine.

When you run MidiBus.list() you should see something like this:
Code:

Available MIDI Devices:
----------Input----------
[0] "IAC Driver - Bus 1"
[1] "Real Time Sequencer"
----------Output----------
[0] "IAC Driver - Bus 1"
[1] "Real Time Sequencer"
[2] "Java Sound Synthesizer"
 

In which case you processing sketch would be something like this (this is really vague, please tell me if you need more detail):
Code:

import processing.serial.*;
import themidibus.*;

MidiBus myBus;
Serial arduino;

void setup() {

  //Set up your sketch and you arduino
  //Set up so your arduino calls SerialEvent with new data

  //Set up the MidiBus using your new IAC bus
  myBus = new MidiBus(this, "", "IAC Driver - Bus 1");
}

void draw() {
  //Important drawing stuff here
}

void serialEvent(Serial port) {
  int data = 0;

  //receive data here eg
  //arduino.readStringUntil(20);
  //or something similar


  //Then you simply do this:
  myBus.sendControllerChange(0, 0, data);
  //or
  myBus.sendNoteOn(0, 0, data);
  //or something else similar
  
}
 

Sorry if that was kinda vague.

Sparky

hello,
I am running into a problem with midibus. I am using it to transfer midi signals to processing, via midiYoke and midiOX on a PC. My problem is that on one XP machine it is working fine, whereas on others processing just doesnt see any midi messages. The one that works was setup over a month ago whereas the latest attempts are only in the last few weeks. How can I trouble shoot this?

UPDATE: the problem was that the working machine  had the older midibus library. The new library I couldnt get to work.

Thanks
Greg

I can't manage to get the MidiBus.list() to include an IAC port. It doesn't come up on my list. Even though other apps can see the port perfrectly well, the list just doesn't include it. Am I missing something? is there a dependent package that I need to install as well as MidiBus, to see the ports available via AudioMidi?


Edited:


Quote:

Hey Sparky
Thanks for your nice reply, it works perfectly. Now I just need to figure out how MIDI really works and what the different commands does.
Keep up the good (excellent) work.
Best regards
Morten