Locrian mode
The Locrian mode , Lokrian for short , (after the Lokrians ), more rarely also "Hyperaeolian mode", is a modern mode that was not included in the system of medieval and early modern church modes . It has recently been added as "completion mode".
In his scale there is a semitone between the first and second as well as the fourth and fifth degree, the other intervals are whole steps . It can be formed by lowering the 2nd and 5th degrees of the natural minor scale or, starting on b, using only the white keys on a keyboard instrument . The locrian scale is thus the only mode that contains the dissonant diminished fifth instead of a pure fifth on the fifth level .
The Locrian mode includes the same pitch space as the Hypophrygic mode with a different tonic and dominant position, the Hypolocrian mode includes the same pitch space as the Lydian mode.
Current music practice
This scale is rarely used in music practice. Occasionally they can be found in jazz and metal , and also in klezmer music under the name Yshtabach .
In jazz, the locrian mode is mainly associated with semi-diminished seventh chords , i.e. chords consisting of the root (1), minor third (b3), minor fifth (b5) and minor seventh (b7). Such a chord type can be derived from the locrian mode (1, b2, b3, 4, b5, b6, b7, 8) and is used e.g. B. in a II-VI compound in minor.
Harder metal - riffs are often in Locrian mode because the diminished fifth and the small second (b2) sound especially dissonant in relation to the root.
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