My keyboard is connected but it’s not triggering in lessons. If your keyboard is selected in the ‘selected device’ dropdown menu but isn’t triggering notes when you play a lesson, try the following. The length and quality of your USB cable matters.Try using a shorter / higher quality cable. If you are using a USB hub or extension cable, connect to your computer directly. To check if your device is sending MIDI, you can download MIDI Monitor (MacOS) or MIDI-OX (Windows). Install this, open the application, and hit a few keys to see if any notes are being registered. #Play alesis q49 keyboard on mac drivers.#Play alesis q49 keyboard on mac install.