Control events
MIDI control change events can be sequenced by specifying the integer control index and the value to set the control change to:
timeline.schedule({
"control": 0,
"value": iso.PWhite(0, 128),
"duration": 0.5
})
The above example sets control index 0 to a value drawn from a uniformly distribution, once every half-beat.
Interpolation
To transmit smooth control curves, isobar can interpolate between control values. The resulting interpolated value is sent continuously to the output device.
# Apply linear interpolation to smoothly fade between values.
timeline.schedule({
"control": 0,
"value": iso.PWhite(0, 128),
"duration": 0.5
}, interpolate="linear")
To jump instantaneously between values when interpolation is being used, simply set a duration of zero. The below applies sawtooth-shaped modulation to a control signal.
timeline.schedule({
"control": 0,
"value": iso.PSequence([ 0, 127 ]),
"duration": iso.PSequence([ 1, 0 ])
}, interpolate="linear")
Interpolation modes include:
linearcosine