This application is a synthesis of music player and musical instrument. To use it, you do not have to learn musical notes and practice playing on a multi-key keyboard. The application contains several built-in songs, for the performance of which you will have to listen to them (for example, on YouTube) and memorize their sound. After that, you will only have to press a single button at the right time, observing the duration of the sound of musical notes and the pauses between them.
https://sites.google.com/view/morse-music/description