Browsing by Author "Marques, Telmo"
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- A computer-mediated interface for jazz piano compingPublication . Dias, Rui; Guedes, Carlos; Marques, TelmoThis paper presents a dynamic interface and voicing algorithm for real-time performance of jazz piano comping. Starting with a given song with a predefined harmonic progression, the algorithm calculates and maps an array of chord voicings to a virtual piano keyboard that can be played in real-time with any physical multi-touch input device like an iPad or computer keyboard. By taking care of the note selection for the voicings, the interface provides a simplified and intuitive way to play sophisticated voicings, while leaving the control over the performance aspects like timing, register, wideness and density to the user.
- George Perle’s twelve-tone tonality: some developments for CAC using PWGLPublication . Marques, Telmo; Ferreira-Lopes, PauloThis paper presents a description and some developments on Perle’s theory and compositional system known as Twelve-Tone Tonality, a system that, because of its characteristics and fundamentals, is currently associated with Schoenberg dodecaphonic system. Some research has been made in the last few decades in order to develop his model in a Computer Assisted Composition (CAC) environment. After some efforts in order to analyse these prototypes, we realize that in general they were discontinued or outdated. A three-scope proposal is so outlined: Firstly, to simplify the grasp of a system that presents an easily understandable starting premise but afterwards enters a world of unending lists and arrays of letters and numbers; Secondly, to present the implementation process already started using PWGL [1] (see Laurson, 1996; Laurson, 2003; Laurson, 2009). Finally, the model is applied in a short original compositional work, and it is presented and analysed emphasizing the standpoints properties of the system. Some further considerations were made regarding the continuity of this project where the construction of a dedicated PWGL library of Perle’s model reveals a pre-compositional necessary tool. PWGL software was selected due to its specific fitting features: it is based on Common Lisp - perfectly powerful and suitable to process lists of integers — and it is specialized in CAC.
- Música analítica 2019: Porto International Symposium on the Analysis and Theory of MusicPublication . Martins, José Oliveira; Marques, Telmo; Moreira, Daniel; Perfeito, Paulo; Serra, Sofia
- Symmetrical and geometrical cycles in twelve-tone composition: developments toward a new modelPublication . Marques, Telmo; Ferreira-Lopes, PauloThe development of a pre-compositional model is proposed in this study based on two systems with two design perspectives: Schoenberg's Serialism and Perle's Twelve-Tone Tonality (from now on TTT). Schoenberg's perspective reveals a linear design where the set has functions like those of a motive; on the other hand, Perle's design result in harmonic simultaneities based on symmetric cycles. The authors propose a model for 12-tone composition that assumes an interactive approach between the horizontal and the vertical statements toward a new pre-compositional system based on geometrical and symmetrical issues. This model is being implemented in PWGL for Computer Aided Composition (CAC) in order to assist the extrapolation of the Motivic/Harmonic fundamental requirements of the model. Finally, the empiric outcome produced in the form of musical composition was analyzed, although not presented in its entirety in the scope of this paper.