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.Zoom
1/3 Tone and Elementary 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.Zoom
1/7 and 1/14 Tone
Accidentals of the seventh and fourteenth tone scales.Zoom
References :
Contents :
- OpenMusic Documentation
- OM User Manual
- OpenMusic QuickStart