| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 31.4 MB | Adobe PDF |
Advisor(s)
Abstract(s)
A evolução tecnológica tornou ubíqua a presença de imagem luz em grande parte dos dispositivos electrónicos (nomeadamente tablets e smartphones). Esta imagem, emitida por ecrãs, é eminentemente mutável, tendo a potencialidade de assumir diversas disposições visuais de carácter instrumental. O problema surge das limitações tácteis inerentes a uma interacção instrumental directa nesses dispositivos, nomeadamente ao nível de intensidade de ataque e manipulação contínua do som.
A presente investigação propõe a conciliação da imagem luz e do tacto através de duas soluções de hardware: a primeira, denominada por protótipo hectográfico, junta uma superfície táctil transparente com capacidade de aquisição de pressão dos eixos XYZ a um ecrã convencional; a segunda, denominada protótipo tablet, junta uma célula de carga para aquisição da pressão do eixo Z a um ecrã com capacidade de rastreamento dos eixos XY.
Em termos visuais, esta investigação centra-se, por delimitação conceptual, no paradigma do teclado, justificado pela sua grande disseminação entre os sistemas discretos e consequente transposição de técnica instrumental. Nesse sentido são apresentadas duas implementações de software: o Instrumento Base, destinado aos dois protótipos; o Continuum Screenboard, destinado ao protótipo tablet. Em termos tácteis, centra-se na aquisição contínua e multidimensional dos eixos XYZ (cmXYZ), onde as soluções de hardware permitem a execução contínua (não-discreta) de altura, intensidade e timbre.
A flexibilidade da imagem luz proporciona diversas representações discretas da altura do som, nomeadamente diferentes escalas (tonais e microtonais), transposições (por movimento de grau e por reajuste de grau), temperamentos e referenciações (alfanuméricas, cores e guias).
Os resultados sonoros obtidos conciliam diferentes configurações discretas e contínuas de altura, intensidade e timbre que variam entre a discrição e a continuidade total. São apresentados dois tipos de progressão contínua de altura sonora (glissando directo e glissando projectado) e diversas parametrizações de vibrato.
Aproveitando o protótipo tablet são apresentados exemplos genéricos de interacção cmXYZ a nível audiovisual, assim como são apontados caminhos para o desenvolvimento de software e hardware.
Esta investigação apresenta uma visão particular no universo instrumental, suscitando uma reflexão do próprio conceito de instrumentalidade, discrição e continuidade instrumental, representação do teclado e levantamento do corpus instrumental associado.
Technological evolution has made ubiquitous the presence of luminous image in most electronic devices (namely tablets and smartphones). This image, emitted by screens, is eminently changeable and has the potentiality to assume several visual dispositions of instrumental character. The problem arises from the tactile limitations inherent to a direct instrumental interaction in these devices, namely with the attack intensity and the continuous manipulation of sound. This research proposes the conciliation of luminous image and tactile pressure using two hardware solutions: the first, called hectographic prototype, joins a transparent tactile surface with pressure acquisition capacity of the XYZ axes to a conventional screen; the second, called tablet prototype, joins a load cell for pressure acquisition of the Z axis to a screen with tracking capacity of the XY axes. The visual scope of this research is focused, by conceptual delimitation, on the paradigm of the keyboard, justified by its large dissemination among the discrete systems and consequent transposition of the instrumental technique. In this sense, two software implementations are presented: the Base Instrument, for both prototypes, and the Continuum Screenboard, intended for the tablet prototype. The tactile scope is focused on the continuous and multidimensional acquisition of the XYZ (cmXYZ) axes, where the hardware solutions allow the continuous (non-discrete) performance of pitch, dynamics and timbre. The flexibility of the luminous image provides several discrete representations of the pitch, namely different scales (tonal and microtonal), transpositions (by movement degree and by readjustment degree), temperaments and visual referrals (alphanumeric, colours and guides). The resulting sounds achieved combine different continuous as well as discrete configurations of pitch, dynamics and timbre ranging from discretion to total continuity. Two types of continuous progression of the pitch (direct glissando and projected glissando) are presented, as well as several parameterizations of vibrato. Starting from the tablet prototype, generic examples of cmXYZ audio-visual interaction are presented, together with paths for software and hardware development. This research presents a particular view of the instrumental universe, prompting a reflection on the very concept of instrumentality, instrumental discretion and continuity, representation of the keyboard and collection of the associated instrumental corpus.
Technological evolution has made ubiquitous the presence of luminous image in most electronic devices (namely tablets and smartphones). This image, emitted by screens, is eminently changeable and has the potentiality to assume several visual dispositions of instrumental character. The problem arises from the tactile limitations inherent to a direct instrumental interaction in these devices, namely with the attack intensity and the continuous manipulation of sound. This research proposes the conciliation of luminous image and tactile pressure using two hardware solutions: the first, called hectographic prototype, joins a transparent tactile surface with pressure acquisition capacity of the XYZ axes to a conventional screen; the second, called tablet prototype, joins a load cell for pressure acquisition of the Z axis to a screen with tracking capacity of the XY axes. The visual scope of this research is focused, by conceptual delimitation, on the paradigm of the keyboard, justified by its large dissemination among the discrete systems and consequent transposition of the instrumental technique. In this sense, two software implementations are presented: the Base Instrument, for both prototypes, and the Continuum Screenboard, intended for the tablet prototype. The tactile scope is focused on the continuous and multidimensional acquisition of the XYZ (cmXYZ) axes, where the hardware solutions allow the continuous (non-discrete) performance of pitch, dynamics and timbre. The flexibility of the luminous image provides several discrete representations of the pitch, namely different scales (tonal and microtonal), transpositions (by movement degree and by readjustment degree), temperaments and visual referrals (alphanumeric, colours and guides). The resulting sounds achieved combine different continuous as well as discrete configurations of pitch, dynamics and timbre ranging from discretion to total continuity. Two types of continuous progression of the pitch (direct glissando and projected glissando) are presented, as well as several parameterizations of vibrato. Starting from the tablet prototype, generic examples of cmXYZ audio-visual interaction are presented, together with paths for software and hardware development. This research presents a particular view of the instrumental universe, prompting a reflection on the very concept of instrumentality, instrumental discretion and continuity, representation of the keyboard and collection of the associated instrumental corpus.
Description
Keywords
Instrumento musical Ecrã Tacto Discrição e continuidade Teclado Musical instrument Screen Haptics Discrete and continuous Keyboard