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OpenMusic DocumentationOM 6.6 User Manual > Score Objects > Score Editors > Microintervals Notation
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Microintervals Notation

Conventions

Scales

OM offers all scales approximations from 1/2 to 1/8 tone, as well as 1/10, 1/12, 1/14 and 1/16 tone approximations.

Accidental Types

All accidentals are ascending, that is, based on naturals and sharps .

Microintervals and Tonality

Microtonal scales are not available in a tonal context.

To cancel the choice of a tonality, press Shift + t. The original "atonal" configuration is be restored.

Accidentals Charts

Note

Scales that don't comprise semitones – 1/3, 1/5, 1/7 and their derived scales can be tricky, for they sometimes have different types of accidentals.

Notation Principles

Naturals are replaced by plain vertical lines – for instance : .

Incrementations of sharps are indicated by two vertical lines – for instance :.

  • 1/4 tone scale :

    the number of vertical lines indicates incrementations of 1, 2 or 3 quarter tones – for instance .

  • 1/8  and 1/16 tone scales :

    three different arrowheads indicate incrementations of a 1/16th , 1/8th and 3/16th tones of naturals and sharps.

  • 1/3 tone scale :

    incrementations of 1 or 2 thirds of tone are shown by the number of additional horizontal lines – for instance .

  • 1/6 and 1/12 tone scales :

    they combine arrowheads with horizontal lines.

  • 1/5, 1/7 tone scale and their multiples :

    they use additional combination of horizontal lines. 

1/2 Tone and Elementary Multiples
Accidentals of the half tone scale and its multiples.
Accidentals of the half tone scale and its multiples.Zoom
1/3 Tone and Elementary Multiples
Accidentals of the third tone scale and its multiples.
Accidentals of the third tone scale and its multiples.Zoom
1/5 and 1/10 Tone
Accidentals of the fifth and tenth tone scales.
Accidentals of the fifth and tenth tone scales.Zoom
1/7 and 1/14 Tone
Accidentals of the seventh and fourteenth tone scales.
Accidentals of the seventh and fourteenth tone scales.Zoom
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