Decreased scale
The diminished scale, or diminished scale, is the most common octatonic scale in music . It consists of eight tones, the distance between two tones is always alternating a whole tone and a semitone . Diminished scales are often used in jazz . They have a tritone content of 4 and a fifth width of 11.
Because of the evenly changing spacing of the individual scale tones, this type of scale is also called alternating eight-step . It has two manifestations: one that begins with a whole step (the whole step -semitone ladder ) and one that starts with a semitone step (the semitone-whole step ladder ). The designation diminished comes from the fact that the tone stock of the alternating eight-step scale consists of two diminished seventh chords that are offset from one another by one second : with the semitone-whole-tone scale by a small second, with the whole-tone-semitone scale by a major second . The alpha chord also consists of the tones of the diminished scale .
Limited transposition possibilities
For reasons of symmetry, there are only three different transposition options in equal tuning ; the alternating eight-level is therefore also the second of the Messiaen modes . Every four diminished keys use the same notes; they only start at different starting points within the scale (indicated in brackets).
Whole-tone halftone ladders:
It diminishes (F sharp, A, C diminished): Eb , F, Ges , As, A , H, C , D, Es D diminished (F, As, H diminished): D , E, F , G, As , B , H , Des, D Des reduced (E, G, B reduced): Des , Es, E , Ges, G , A, B , C, Des         
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These are identical to the following semitone-whole-tone conductors:
- Es , E, F # , G, A , B, C , Des, Es
- D , Eb, F , F sharp, G sharp , A, B , C, D
- Cis , D, E , F, G , As, B , B, Cis
literature
- Zsolt Gárdonyi , Hubert Nordhoff: Harmonics. Revised and expanded new edition. Möseler, Wolfenbüttel 2002, ISBN 3-7877-3035-4 .