This project is a DIY piano player. It is still a work in progress.
To make this project run, you will need to install a few libraries. First, you will need to install the ESP32 in the Arduino IDE. You can do that by following this guide.
Then you will need to search for a few libraries to install in the IDE. The first is Arduino-BLE-MIDI. If you install this through the Arduino IDE, you don't need to install the midi library. But if you don't install it through the IDE, you need to install it from here. And finally, you need the PCA9635 library.