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Integrating Constraints and Concurrent Objects in Musical Applications: A Calculus and its Visual Language

Integrating Constraints and Concurrent Objects in Musical Applications: A Calculus and its Visual Language,Constraints - An International Journal,Cami

Integrating Constraints and Concurrent Objects in Musical Applications: A Calculus and its Visual Language   (Citations: 14)
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We propose PiCO, a calculus integrating concurrent objects and constraints, as a base for music composition tools. In contrast with calculi such as (5), (9) or TyCO (16), both constraints and objects are primitive notions in PiCO .I nPiCO a base object model is extended with constraints by orthogonally adding the notion of constraint system found in the‰-calculus (12). Concurrent processes make use of a constraint store to synchronize communications either via the ask and tell operations of the constraint model or the standard message-passing mechanism of the object model. A message delegation mechanism built into the calculus allows encoding of general forms of inheritance. This paper includes encodings in PiCO of the concepts of class and sub-class. These allow us to represent complex partially defined objects such as musical structures in a compact way. We illustrate the transparent interaction of constraints and objects by a musical example involving harmonic and temporal relations. The relationship between Cordial, a visual language for music composition applications, and its underlying model PiCO is described.
Journal: Constraints - An International Journal - CONSTRAINTS , vol. 6, no. 1, pp. 21-52, 2001
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