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Research

A "Rhythmic Contour Map" combining magnitude and phase outputs from the continuous wavelet analysis of a portion of the snare drum rhythm of Maurice Ravel's "Bolero".


My research concerns modelling the task of emergent musical rhythm perception. This includes models of syncopation, rhythmic complexity, rhythmic expectancy, similarity, beat tracking, downbeat determination and the use of continuous wavelet transforms for time-frequency representations of musical rhythm.

Background

B.App.Sc (1988) and PG Dip. (1991) in Computing Science from Curtin University of Technology, Western Australia. Ph.D from the University of Western Australia (2001). Industrial software design, development and management in cryptography, communications, signal processing, machine learning, computer music and video analysis systems from 1988 to 2005. From 2005 to 2010 I worked as a post-doctoral researcher with the Music Cognition Group, within the Institute for Logic, Language and Computation, Universiteit van Amsterdam, and in the Analysis/Synthesis Group at IRCAM on the Quaero Project, in music information retrieval.

Demonstrations

  • Foot-tapping with Rubato

    An example of automatic interpretation of a rhythm undergoing extreme asymmetrical rubato (tempo variation).

  • Clapping to Auditory Salience Traces

    The continuous wavelet transform (CWT) of Morlet and Grossman can also be applied to decompose a rhythm represented by a continuous trace of event "salience" derived directly from the audio signal.

Publications

  • Abstracts and PDFs of my peer reviewed publications

Lectures

Software

  • Multiresolution Rhythm

    A Common Lisp library of the Multiresolution Rhythm model of rhythm, syncopation and expectation representation as produced during the EmCAP project.

  • NLISP

    A numerical library for Common Lisp, incorporating plotting, array syntax and linkage to the Gnu Scientific Library, that I collaborate in development.

  • The MusicKit and SndKit

    I maintain the MusicKit (originally written by David A. Jaffe and Julius Smith III) and SndKit, two Objective-C libraries for music and sound representation and low-latency performance.

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