We should not forget of course the very famous and well known in Irish tunes music, D2A2D3G3A3D4 tuning
https://en.wikipedia.org/wiki/DADGAD
This book is for learning music composition and improvisation , based on more abstract mathematics of the music, the rhythm and the musical instrument and with new musical practice. It is a new awareness and method to link mental perception-images, the creation of feelings and finger actions. The true goal of composition and improvisation is the existential process of creating and listening it. It is both individually healing and socially celebrating.