Musical note commonly), a double sharp sign on a key signature with a single sharp indicates only a double sharp, not a triple sharp. Assuming enharmonicity, many accidentals will create equivalences between pitches that are written differently. For instance, raising the note B to B is equal to the note C. Assuming all such equivalences, the complete chromatic scale adds five additional pitch classes to the original seven lettered notes for a total of 12 (the 13th note completing the octave), each separated by a half-step. Notes that belong to the diatonic scale relevant in the context are sometimes called "diatonic notes";
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