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- HASGS: Hybrid augmented system of Gestural Symbiosis Generating Visual InformationPublication . Portovedo Marques, Henrique; Ferreira-Lopes, PauloThis paper discusses how an augmented instrument, HASGS in the context of interactive electronic music, motivates the generation of different graphical user interfaces taking in consideration the repertoire being composed for it. New composition aesthetics are deeply influenced by electronic materials and sonic repositories at the same time as new mediums are currently seen as possible extensions of instrumental practice. These mediums are available for creative purposes during composition and performative processes. While the aesthetics of acoustic and electronic sounds are creating mutual influences, composers and sound designers are developing new languages, new gestural attitudes, new extended techniques, new notation methods, new performative paradigms including the creation of graphical interfaces for visual feedback. This augmented system for saxophone was motivated by the need to perform pieces with a common aesthetic that have been written using electronic environments. Those pieces shared the need for the control of external devices in order to be performed. The repertoire for saxophone and electronics is growing in a huge scale, from pieces using stomp boxes or control pedals for different triggering or fading, to pieces requiring the manipulation of knobs. These controllers, by their nature, devices that separate sound production (synthesis) and performer gesture (control), have subsequently generated an increased interest in the study of compositional mapping strategies for computer music. From our experience, we conclude that the graphical user interface (GUI) is fundamental for the understanding of the individuality of each piece, as well as to understand the relation between the augmentation system and the piece itself. If this project started with the idea of contributing to a new performative paradigm regarding the existing repertoire, new repertoire and improvisational performance situations led to the development of a hybrid system contributing to bio-feedback incorporation in the work of art, while creating new graphical user interfaces for visual feedback.
- Conceiving involuntary movements as musical performance toolsPublication . Portovedo, Henrique
- Composition models for augmented instruments and new interfaces: HASGS as case studyPublication . Portovedo, Henrique; Lopes, Paulo Ferreira; Mendes, RicardoThis paper presents the concept of HASGS regarding the augmentation procedures applied to an acoustic instrument, at the same time that it is analyzed how composers applied technology prototyped to the composition of works. The development of HASGS has been driven by the compositional aspects of the original music created for this specific electronic augmented instrumental system. Instruments are characterized not only by their sound and acoustical properties but also by their performative interface and evolutionary repertoire. This last aspect has the potential to establish a practice among performers at the same time as creating the ideal of community contributing to the past, present and future of that instrument. Augmenting an acoustic instrument places some limitations on the designer ́s palette of feasible gestures because of those intrinsic performance gestures, and the existing mechanical interface, which have been developed over years, sometimes, centuries of acoustic practice. We conclude that acoustic instruments and digital technology, are able to influence and interact mutually creating Augmented Musical Performance environments based on the aesthetics of the repertoire being developed. This work is, as well, a resource of compositional methods to composers and programmers.
- HASGS: Hybrid augmented system of Gestural Symbiosis Generating Visual InformationPublication . Portovedo Marques, Henrique; Ferreira-Lopes, Paulo
- Music for HASGSPublication . Portovedo Marques, Henrique
- HASGS the repertoire as an approach to prototype augmentationPublication . Portovedo, Henrique; Lopes, Paulo Ferreira; Mendes, RicardoThis paper discusses the development of HASGS regarding augmentation procedures applied to an acoustic instrument. This development has been driven by the compositional aspects of the original music created in specific for this instrumental electronic augmented system. Instruments are characterized not only by their sound and acoustical properties but also by their performative interface and repertoire. This last aspect has the potential to establish a practice among performers at the same time as creating the ideal of community contributing to the past, present and future of that instrument. Augmenting an acoustic instrument places some limitations on the designer ́s palette of feasible gestures because of those intrinsic performance gestures, and the existing mechanical interface, which have been developed over years, sometimes, centuries of acoustic practice. We conclude that acoustic instruments and digital technology, are able to influence and interact mutually creating Augmented Performance environments based on the aesthetics and intentions of repertoire being developed.
- Audible (Art): an introduction to the invisible sonic connectionsPublication . Gomes, José Alberto; Portovedo, Henrique; Carvalhais, MiguelThis is an introduction to a special edition of JSTA dedicated to the myriad forms of sonic connections and audible expressions. We approach three dimensions of sound in an artistic context: auditory specificities, performance dimensions, and computational listening. Sound is a complex phenomenon present in everyday life and dwelling between conscious and unconscious processes. A universe contained within itself, where every sound event has the potential to be considered aesthetic material, contributing to the proliferation of creative approaches. These specific conditions have potentiated an outbreak of sonic art genres and expressions. Listening as an epistemic process has been subjected to successive changes pushed by computation and the breeding of computational media. The intertwining of computation with environments leads to a state of permanent re-articulation, and supports the development of new relations in meta-environments, turning listening into a hybrid process of human and computational operations. This essay points to visions and approaches to sound as a specific field of knowledge that can arise from, lead to, or be used as a tool of world-building.