Tritone content
The tritone content of a scale or a chord indicates how many tritoni it contains. It also provides information about the strut effectiveness and the tension level .
Effects
Since the tritone has a great tendency to dissolve, its presence also influences the perception of sound in an increasing manner. For example, an anhemitonic pentatonic has a tension-free effect because the tritone content is zero. A major scale , on the other hand, has a tritone content of 1, which on the one hand implies the presence of leading tones and on the other hand explains the dominant position of the dominant . In contrast, the acoustic scale ( MM 4 ) already has a tritone content of 2. Scales with a higher tritone content, such as the Messiaen scales , are sometimes perceived as bulky, as the fifths width increases at the same time.
Furthermore, the tritone content can be applied well to chords. For example, the tritone content of a dominant seventh chord is 1, and a diminished seventh chord 2. Correspondingly, the strut effectiveness is higher with the latter.
literature
- Andreas Pilsenbeck: Jazz Theory I - Harmonics and Scales . Bärenreiter-Verlag, Kassel 2007, ISBN 978-3-7618-1966-1 .
- Zsolt Gárdonyi, Hubert Nordhoff: Harmonics . Möseler Verlag, Wolfenbüttel 1990, ISBN 978-3-7877-3035-3 .