Step 3: let's play

What do we have?

At this point we should have something like this:

1. A sketch loaded which uses the MIDI library
2. Arduino UNO board with the MIDI firmware flashed
3. The micro-controller connected to your Mac through USB cable

What's next?

Now we want a MIDI software to play music with our brand new MIDI controller.
Here are the steps to do this:

1. Open the Audio MIDI Setup
   

2. Go to Window > Show MIDI Studio

3. If everything has gone correctly you should see something like this:
   
   IMPORTANT: Make sure the Test Setup button is highlighted

4. You can also click on the arrow of arduino_midi to send a MIDI command to the micro-controller
   

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