The duration of the delay that the background thread will wait for before yielding the value to the destination buffer.
ARGUMENT:: doneAction
An integer representing an action to be executed when the process is finished. This can be used to free the enclosing synth, etc. See link::Classes/Done:: for more detail.
ARGUMENT:: trig
The trigger to start the job.
ARGUMENT:: blocking
The thread on which the job is processed.
returns::It report the approximate job progress, from 0 to 1.