CNMAT Flashback

A look back at some items in our archives.

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Publication

Managing Complexity with Explicit Mapping of Gestures to Sound Control with OSC

M. Wright, Freed, A., Lee, A., Madden, T., and Momeni, A., “Managing Complexity with Explicit Mapping of Gestures to Sound Control with OSC”, in International Computer Music Conference, Habana, Cuba, 2001, pp. 314-317.

Managing Complexity with Explicit Mapping of
Gestures to Sound Control with OSC

Matthew Wright, Adrian Freed, Ahm Lee, Tim Madden,
Ali Momeni

CNMAT, UC Berkeley, 1750 Arch St., Berkeley, CA
94709, USA

{matt,adrian,ahm,tjmadden,ali}@cnmat.berkeley.edu

Publication

New Media for Musicological Research and Education - The Country Blues in HyperMedia

A. Freed, “New Media for Musicological Research and Education - The Country Blues in HyperMedia”, in 15th International Computer Music Conference, Ohio State University, 1989, pp. 109-112.

Introduction

This overview describes work at the Center for New Music and
Audio Technology (CNMAT) on application of hypermedia tools to
musical subjects.

Project #1: The Country Blues
- a Hypermedia Presentation

Publication

A Real-Time 3D Signal Analysis/Synthesis Tool Based on the Overlap-Add Short-Time Fourier Transform

A. Peevers, “A Real-Time 3D Signal Analysis/Synthesis Tool Based on the Overlap-Add Short-Time Fourier Transform”, UC Berkeley, Berkeley, CA, 1994.

A Real Time 3D Signal Analysis/Synthesis Tool Based on the Short Time Fourier Transform

Alan Wesley Peevers,
Masters Thesis, February 2004,
Department of Electrical Engineering
University of California, Berkeley

Publication

Towards a More Effective OSC Time Tag Scheme

A. Freed, “Towards a More Effective OSC Time Tag Scheme”, in Open Sound Control Conference, Berkeley, CA, 2004.

Time tags are not widely used in OSC. This paper will introduce the original intention of time tags, discuss the challenges of implementing and using them, and introduce some new ideas about how they might be better employed and implemented.

Time tags were introduced to address a number of problems and concerns we encountered at CNMAT using a predecessor protocol to OSC:

Publication

Characterization of Spherical Loudspeaker Arrays

P. Kassakian and Wessel, D., “Characterization of Spherical Loudspeaker Arrays”, in 117th Audio Engineering Society Convention, San Francisco, CA, 2004, p. Convention paper #1430.

The synthesis and rotational control of radiation patterns produced by spherical arrays of loudspeakers is studied. We identify operating regions, in terms of complexity of patterns and frequency ranges, over which patterns can be accurately synthesized. By considering an inner product space of far- eld patterns, we can reason geometrically about approximation errors when using the systems to synthesize and control target responses.

Publication

Design of Low-Order Filters for Radiation Synthesis

P. Kassakian and Wessel, D., “Design of Low-Order Filters for Radiation Synthesis”, in 115th Audio Engineering Society Conventtion, New York, NY, 2003, p. Convention Paper 5925.

A fundamental goal of sound synthesis is to reproduce, and to control, as many facets of the sound as possible. By numerically solving a carefully constructed optimization problem, we are able to design low-order filters for use with a dodecahedral loudspeaker array to synthesize low order spherical harmonics over specified frequency ranges. The method, a variant of least-squares, is general, allowing for the inclusion of side constraints, arbitrary array geometry, and incorporation of measured loudspeaker characteristics.

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