Planejamento composicional a partir de sistemas e estratégias de organização e seleção pós processamento

Abstract

Compositional Planning Based on Systems and Strategies of Organization and Post-processing Selection

Oral communication

ABSTRACT

Research Question/Problem

The theory of compositional systems (XXX, 2020) understands musical composition as a methodology that encompasses three epistemological levels. At the most superficial level, we have the composition process in which a score or an audio file is produced. Prior to that, at the second level, we have the construction of a compositional plan, in which the various objects and relationships involved in the compositional process are managed, while at the deepest level, we deal with a structure formed solely by relationships and generic objects. In compositional systems engineering, we can produce specifications that may contain objects with a certain degree of complexity, not directly constituting musical components present in a score or audio file. Thus, at the compositional planning stage, an intermediate epistemological level, the outputs produced by the systems need to be understood and organized, within the level of abstraction and complexity characteristic of them and possibly with the aid of tools (xxxx, 2019). Schema theories in the field of cognitive psychology help psychologists explain how people process complex situations and events (Matlin, 2004, p. 172). Composers need to deal with output objects, which can encompass both surface parameters and more complex abstract objects, and their organization needs to be planned to offer choices and explain compositional strategies adopted.

Objectives

The aim of this research is to provide assistance to the stages of compositional planning, exploring the use of abstraction resources in the generation of the compositional plan. In Xenakis's compositional process (1992), the composer made use of graphical representation using diagrams to explain more complex case studies. Similarly, the use of graphs is also proposed in the planning stages, in order to explain the organization of output data from compositional systems and to allow an analysis of the options for their use.

Method (only for empirical research)

The method involved the use of graphical representation as a tool to facilitate the understanding of the options for organizing output objects from the processing of compositional systems, with the selection of analytical tools to group or select the output data.

Results and/or Main contributions

The proposed methodology produced a composition plan with options for texture and density-number (Berry, 1987) to organize the pitch parameter of a written work for three instruments: flute, viola, and harp. The output data of a hybrid system were organized through contour values formed by the number of voices present in the various segments generated by the system's processing. In practical terms, this methodology presents a pedagogical perspective, in the sense that it organizes the compositional thinking of students or young composers.

Conclusions and/or Implications

In compositional planning, a lexical set was defined so that the composer could choose one of the options to write the voice distribution of each of the segments of the piece. Thus, the initial problem described was solved through the production of charts, which facilitated the use of the system's output objects.