Test your MIDI connection in Audio MIDI Setup on Mac
After you set up a MIDI device, you can test the connection by sending MIDI information to and from the device.
Before you test the connection, make sure that your device appears in the configuration pane on the left.
In the Audio MIDI Setup app on your Mac, choose Window > Show MIDI Studio, then click the Test MIDI Setup button in the MIDI Studio toolbar.
To test a MIDI interface’s MIDI Out port, click the down arrow on the device icon in the configuration pane. This highlights the output port icon and sends a MIDI signal to your device.
If your device has status lights for data transmission, the light for the port you clicked should illuminate. If your device is properly connected for audio output and it’s set up to receive on the MIDI channel that Audio MIDI Setup is broadcasting on, the device also makes a sound.
To test a MIDI interface’s MIDI In port, play a note on a controller (such as a keyboard) that’s attached to your interface. The MIDI In port icon (up arrow) is highlighted as it receives the signal.
Click the Test MIDI Setup button to turn off test mode.
If the MIDI signals are working correctly but your MIDI device doesn’t make a sound, check the following:
The MIDI cables are connected to the appropriate input and output ports.
The audio output from your device is connected properly to your amplification system.