Undezime

Diatonic intervals
Prime second third fourth fifth sixth seventh octave none decime undezime duodecime tredezime semitone / whole tone
Special intervals
Microinterval Comma Diësis Limma Apotome Ditone Tritone Wolf fifth Natural septime
units
Cent Millioctave Octave Savart

As eleventh (v. Lat. Undecimus "the eleventh") is referred to in the music an interval , which is composed of octave and fourth composed and eleven pitches of a diatonic , heptatonic scale spans (eg. C-f ¹ ). The frequency ratio between a pure undecimal and its fundamental is 8/3.

Note example: undecimal intervals

The (pure) undecimal (a) comprises seventeen semitones. In counterpoint and harmonic movement, undecimals are usually treated like fourths.

In the jazz harmonic , the undezime plays a special role as the fifth third above the root note (b); it is numbered with “11” in the chord symbolism.

In connection with the partial tones , e.g. B. in organ registers , the 11th partial is called the undezime. This undecimal has a frequency ratio of 11: 8 to the next lower octave.