Formalisms and Interfaces to Manipulate Music Information: The Case of Music Petri Nets

Computer-Human Interaction in Music Composition Through Petri Nets

“…When required, the tab lets the user set specialized parameters (see the middle and the right tabs). This figure is taken from [7].…”

“…Blocks, carrying only music content so far, now contain tab views that allow to track step-by-step the transformations achieved by single operators. Figure 10, extracted from [7], shows a clarifying example about cascading transformations of audio content: a sine wave is first transposed one octave below (pitch shifting by a factor 0.5) and then faded out after n samples. The figure illustrates the graphical aspect of the three panels contained in the same block.…”

“…Score of Frère Jacques (above), the corresponding graph (middle), and the underlying MPN, obtained at the end of the post-processing phase (below). This figure is taken from [7].…”

“…As explained below, our belief is that an answer can be found in the field of computer-human interaction, thanks to the design and implementation of suitable software tools acting as both editors and players. This paper is an extension of the work presented at the 2 nd International Conference on Computer-Human Interaction Research and Applications (CHIRA), held in Sevilla, Spain in 2018 [7]. In that occasion, we presented a theoretical framework to compose music with Petri nets, supporting basically three types of music objects: symbolic objects, computer-driven performance objects, and audio objects.…”

“…1. The implementation of a Web editor for music Petri nets, somehow different from the sketch presented in [7]; 2. An extension of the original theoretical framework, mainly due to the awareness that a clear distinction between notation, computer-driven performance and audio could be of little worth in contemporary music.…”