Button and sound test

In this iteration of the project, I try to make a very simple
implementation of three buttons, each playing the sound of a kalimba.
Button sound test

In this iteration of the project, I try to make a very simple
implementation of three buttons, each playing the sound of a kalimba.
Revert "Button and sound test"

This reverts commit c5d28fa472f59848ded97e7d93b4465710904105.