OpenMusic DocumentationHiérarchie de section : OpenMusic QuickStart > A Musical Application > Chord & Musical ObjectsThe Chord Object – & Musical Objects in General –
Class, factory box and instance concepts
Adding a chord factory box in the patch editor
Boxes properties and morphology : inputs, arguments, default values and outputs
Viewing and listening to the content of a chord
Main Links to the User Manual
- Class
A category of objects sharing common properties – characteristics and behaviour. A class specifies the internal structure and behaviour of an object. In OM, it is represented in a patch by a factory box that can produce an instance of a class.
See also : Object, Instance
- Object
A thing provided with properties – characteristics and behaviour. An object is defined by a class and shares the same characteristics with other objects belonging to the same class.
An exemplar of a class.
For instance, the class of Note defines all possible notes by listing the characteristics and behaviors they can have. The object A4 is a particular note : it is an instance of the Class note, with particular versions of its characteristics. A note has a pitch. An A4 is a 440 Hz note.
See also : Class, Instance, Object Oriented Programming.
- Factory Box
A box used for creating an instance, or exemplar, of a given class within a visual program.
- Instance
An actual object created at runtime, out of a given class. In OM, more specifically, an object created when evaluating a factory box. An instance can be saved as a global variable.
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SHIFTclick on an outlet – especially the first outlet representing the self, the whole object – of a factory box to materialize an instance. - Offset
Temporal position of an object.
In a chord, each note can have a specific offset.
