Music Composition There are two main avenues of research in terms of compositional applications within PWGL: 1. we study the use of common music notation as the user-interface component when dealing with any music related problem and more specifically for writing compositional rules, and 2. we implement a “meta-score� editor which is designed for manipulating the structural dimension of a composition by allowing us to arrange fragments of music against a global time line. As an example, let us take a look at the score shown in Fig. 2. We begin our score by composing by hand the melodic line for bassoon shown in (a). Next we add the object shown in (b) which by default will be empty. At this point, the duration and the onset-time of the object are not important. For our next step we establish that the process associated with the object (b) is :pedal. Pedal objects are special orchestration devices that need a piece of music as a data-source in order to function. They create an orchestral pedal texture according to the pitch and rhythm received from the data-source. The desired orchestration used for the pedal object can be defined using keywords, such as, :strings or :woodwinds but can also be defined in more detail. Finally, in (c), we create the connection between the objects (a) and (b), i.e., we establish that the object (a) is the data-source for the object (b). The string texture shown in (b) is generated as soon as the data-source is connected and the boundaries (vertical and horizontal) of the object are adjusted accordingly.
Fig. 2
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