Figures9.Starting from 0 and using only major third and minor third you create this matrix and then locate in the "MEUYAN" all the pitch classes of a GIVEN SCALE AND ALL THE TRIADS OF THIS SCALE. In this way you can locate all scales and their triads. I think that it is something you can find only in the western music. there are no other pitch collections with such properties.in The "meuyan"[From the articleBalzano's direct product group. Single steps are minor thirds in the y-dimensionand major thirds in the x-dimension. A diatonic major set is shown based around C as an asymmetrical region. (Note that this two-dimensional representation constitutes an "unrolling" of a toroidal structure on the surface of which all points of the same integer are coincident.)]ABOUT CIRCLE OF FIFHTTake a look at the down-left-circle if you start from any note and go in the watch direction 5 steps and add to this pitch classes collection the pitch-classthat stands one step downward you will see that you have all the pitch classes of the scale of the one you start, but not in order - in a terminology I learnedfrom you- we got the set of 7 but not as an order list. It sounds a little complicated but if you'll try it on the circle its very easy. For example, lets start from A and then going in the circle we got E B F# C# G# + the one downward A = D --- D A E B F# C# G# = The pitch classes of the scale A Major.(as you know you can build the same circle going down fifths for the Bemol scales.)[Figure 8 FROM THE ARTICLEUpper two circles show the chroma circle as note-names and as integers; lower two circles show the circle of fifths as note-names and as