crange : two-sided slider, with its own graph lines, for time-varying controls


crange(name='range', label='Pitch', min=20.0, max=20000.0,
       init=[500.0, 2000.0], rel='log', res='float', gliss=0.025,
       unit='x', up=False, func=None, midictl=None, col='red', help='')


This function creates a two-sided slider used to control a minimum and a maximum range at the sime time. When created, the range slider is stacked in the slider pane of the main Cecilia window in the order it is defined. The values of the range slider are passed to the module with a variable named The range minimum is collected using[0] and the range maximum is collected using[1]. The up argument passes the values of the range on mouse up if set to True or continuously if set to False. The gliss argument determines the duration of the portamento (in sec) applied on a new value. The resolution of the range slider can be set to ‘int’ or ‘float’ using the res argument. Slider color can be set using the col argument and a color value. However, sliders with up set to True are greyed out and the col argument is ignored.

Every time a range slider is defined, two graph lines are automatically defined for the grapher in the Cecilia interface. One is linked to the minimum value of the range, the other one to the maximum value of the range. The recording and playback of an automated slider is linked to its graph line.


In order to quickly select the minimum value (and graph line), the user can click on the left side of the crange label, and on the right side of the label to select the maximum value (and graph line).


name: str

Name of the range slider.

label: str

Label shown in the crange label and the grapher popup.

min: float

Minimum value of the range slider.

max: float

Maximum value of the range slider.

init: list of float

Range slider minimum and maximum initial values.

rel: str {‘lin’, ‘log’}

Range slider scaling. Defaults to ‘lin’.

res: str {‘int’, ‘float’}

Range slider resolution. Defaults to ‘float’

gliss: float

Portamento between values in seconds. Defaults to 0.025.

unit: str

Unit symbol shown in the interface.

up: boolean

Value passed on mouse up if True. Defaults to False.

func: list of list of tuples

Initial automation in break-points format (serie of time/value points). Times must be in increasing order between 0 and 1. The list must contain two lists of points, one for the minimum value and one for the maximum value.

midictl: list of int

Automatically map two midi controllers to this range slider. Defaults to None.

col: str

Color of the widget.

help: str

Help string shown in the crange tooltip.