Musical abacus in english
The Musical Abacus integrates the main concepts in Music Theory, relating them in a logical and ordered way.For beginners, simple to use, for those without prior knowledge to reading music. It consists of two rotating discs,one being cardboard and the other plastic. Both discs are 12-sided polygons (or dodecagons). This is due to the fact that there are 12 different musical notes and, therefore,...