Atzarin is an amazing new keyboard arrangement for bisonoric accordion, bandonion, concertina, Chemnitzer etc. Easy to adapt to from conventional bisonoric layouts, it smoothly bridges the gap between diatonic and chromatic instruments, maintaining and taking full advantage of the bisonoric nature of the instrument and enabling a comfortable and natural fingering style on a logical arrangement of musical notes that is fully chromatic and mostly isomorphic.

The Atzarin keyboard layout puts chromacity, isomorphism and the bisonoric possibilities of bellows driven instruments to full advantage in a unique combination. Neutral and fully chromatic in both directions of the bellows, it eliminates the need to change instruments or adapt the music, making it possible to play in any musical key with the same ease, using the same unchanging ergonomic chord shapes, scale and arpeggio patterns etc. in different keys.

Alternative shapes and patterns in the oppposite direction of the bellows, allow the musician to choose the most comfortable, convenient or easiest form. At the same time, notes that are far apart from each other in one direction of the bellows are brought closer together in the opposite direction, making it possible to avoid uncomfortable stretches and leaps of the hand and offering alternatives for fingering, keystroke sequencies and bellows changes.

On the whole, learning both the instrument and music in general is faster and easier than on conventional bisonoric layouts and playing style is more comfortable and depends far more on the preferences and choices of the musician than on the idiosyncracies and limitations of conventional bisonoric layouts.