Heptatonic scale are considered subsets of a twelve-pitch scale roughly analogous to the Western chromatic scale. The first and fifth melakarta tones, corresponding to the first and eighth chromatic tones, are invariable in inflection, and the fourth melakarta tone, corresponding to the sixth or seventh chromatic tone, is allowed one of two inflections only, a natural ("shuddah") position and a raised ("tivra") position. The second and third melakarta tones can be picked from the 4 chromatic tones (second through fifth), and similarly for the sixth and seventh. Thus the number of possible forms is equal to twice the square of the number
Istrian scale Istrian scale "Istrian scale" refers both to a "unique" musical scale and to the Istrian and Kvarnerian folk music genres which use the scale. It is named for the Istrian peninsula. Genres include "kanat" and "tarankanje"; techniques include nasal tone, variation and improvisation, and resolution to the unison or octave; and instruments include "sopele" shawms, bagpipes, flutes, and "tambura" lutes. It was first named by Ivan Matetić Ronjgov early in the twentieth century, assisting his study and notation of Croatian music. Non-equal-tempered, the scale could approximately be notated as: E-F-G-A-B-C [hexatonic] (see: enharmonic), the first six notes of an octatonic