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.
All accidentals are ascending, that is, based on naturals and sharps .
Microtonal scales are not available in a tonal context.
To cancel the choice of a tonality, press
t. The original "atonal" configuration is be restored.
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.
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.