OpenMusic 6 – User ManualHierarchie de section : Advanced Visual Programming > Control Structures > Sequential OperatorsSequential Operators
Sequential operators control the occurrences of operations in program. They can apply to the iteration of an operation, or to the succession of several operations at a single evaluation.
Sequential operators can be accessed via the OM Kernel / Control menu.
Repeat-n : Iteration
 | Repeat-n evaluates something a number of times and collects the results in a list. this allows not to repeat a manual evaluation. It has two default inputs.
"self" is repeated n times. Its output returns the result as a list. |
Here, repeat-n is applied to om-random to produce a random notes sequence.
Repeat-n evaluates om-random 15 times, which returns a random value each time. The resulting list is returned to the pitches input of the factory box. |  |
More complex or specific iterative processes can be designed and controlled via the OMLoop module editor.
Sequence : Executing Several Tasks
 | The sequence box executes a sequence of distinct operations. It has one default input and output, and can be added as many optional inputs as necessary :
Multiple outputs can return the result of corresponding upstream operations to other boxes. |
A chord-seq is generated while other tasks are executed.
When the chord-seq is evaluated, sequence performs three tasks :
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print "avant",
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generate and print a random list of numbers,
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print "après".
Then, the value of its second output is returned to the "pitch" input of the chord-seq.
Note that without print, the Listener wouldn't display the values the outputs of sequence. These values can be returned with an individual evaluation of each output.
