Diastema API¶
Diastema : Core operations on intervals.¶
This module defines functions for basic operations on intervals, i. e. conversions from logarithmic into linear spaces, a list of reference epimoric intervals and a function for setting the unit be used.
You can also get the closest epimoric reference interval to an interval in the current unit, and the difference. If we are using the savart units :
>>> get_inter_ref(300)
('300.00', '2/1', '-', '1.03')
>>> get_inter_ref(303)
('303.00', '2/1', '+', '1.97')
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music22.diastema.cent(y)[source]¶ Convert the given interval (as ratio) to cent.
>>> cent(3/2.) 701.95500086538743
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music22.diastema.convert_ref()[source]¶ Convert all the reference intervals (given by get_intervals()) from ratios to a linear space.
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music22.diastema.dias(y)[source]¶ Convert the given interval (as ratio) to the global chosen unit. Default is savart.
>>> dias(3/2.) 176.09125905568123
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music22.diastema.get_inter_ref(x)[source]¶ Look for the closest epimoric interval.
Paramètres: x (int) – an interval in savart/cent. Retourne: y – the closest interval from the reference intervals. Type retourné: tuple Example
>>> get_inter_ref(300) ('300.00', '2/1', '-', '1.03') >>> get_inter_ref(303) ('303.00', '2/1', '+', '1.97')
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music22.diastema.get_scale(echelle)[source]¶ Compare given intervals to reference intervals.
Paramètres: echelle (list) – a list containing intervals in a linear scale. Retourne: Prints a list of tuples - Example :
>>> a = [125,256,300] ('125.00', '4/3', '+', '0.06') ('256.00', '3/2*6/5', '+', '0.73') ('300.00', '2/1', '-', '1.03')