Tiago Fernandes Tavares

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Hyper-instruments extend traditional acoustic instruments with sensing technologies that capture digitally subtle and sophisticated aspects of human performance. They leverage the long training and skills of performers while simultaneously providing rich possibilities for digital control. Many existing hyper-instruments suffer from being one of a kind(More)
The Gyil is a pentatonic African wooden xylophone with 14-15 keys. The work described in this paper has been motivated by three applications: computer analysis of Gyil performance, live improvised electro-acoustic music incorporating the Gyil, and hybrid sampling and physical mod-eling. In all three of these cases, detailed information about what is played(More)
—Music transcription refers to the process of detecting musical events (typically consisting of notes, starting times and durations) from an audio signal. Most existing work in automatic music transcription has focused on offline processing. In this work we describe our efforts in building a system for real time music transcription for the vibraphone. We(More)
This paper describes an interactive audiovisual musical installation, namely MOTUS, that aims at being deployed using low-cost hardware and software. This was achieved by writing the software as a web application and using only hardware pieces that are built-in most modern personal computers. This scenario implies in specific technical restrictions, which(More)
—Spectrogram factorization methods such as Non-Negative Matrix Factorization (NMF) are frequently used as a way to separate individual sound sources from complex sound mixtures. More recently, they have also been used as a first stage for the automatic transcription of polyphonic music. The problem of sound source separation is different (but related) to(More)
An automatic music transcriber is a device that detects, without human interference, the musical gestures required to play a particular piece. Many techniques have been proposed to solve the problem of automatic music transcription. This paper presents an overview on the theme, discussing digital signal processing techniques, pattern classification(More)
A common approach to the detection of simultaneous musical notes in an acoustic recording involves defining a function that yields activation levels for each candidate musical note over time. These levels tend to be high when the note is active and low when it is not. Therefore, by applying a simple threshold decision process, it is possible to decide(More)
High-dimensional optimization problems may be addressed using populational meta-heuristics, whose statistical properties may indicate important characteristics of the optimization process. There is a great number of these properties, which means their joint visualization may become impractical. We developed a method for sonically displaying characteristics(More)
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