The building block of an Atzarin arrangement of notes is a triangle that has different musical notes at each point of the triangle. The exact notes are determined by the musical intervals on each side of the triangle and the position of each triangle in the layout.
This section explains how the arrangement of buttons and the arrangement of musical intervals in triangles give rise to Atzarin arrangements of musical notes and how there can be 8 different kinds of layout using the same method of arranging notes, and finally explains what the inventor considers to be the best embodiment of Atzarin, the best kind of keyboard arrangement.