Roads, Curtis

Roads, Curtis. The Computer Music Tutorial Cambridge, Mass. MIT Press, 1996. A comprehensive reference written by an acknowledged expert and respected professor of music technology. 

Franklin Curtis roads 4106 Sand Creek Boise, ID b 208-939-1337... 

Curtis C. Maier, PhD, Head of Immunologic Toxicology, Department of Safety Assessment, GlaxoSmithKline Pharmaceuticals, 709 Swedeland Road, UE0360, King of Prussia, PA 19406, E-mail curtis.c.maier gsk.com Chapter 8.2 Nonclinical Models to Assess Respiratory Hypersensitivity Potential... 

Curtis Roads. Asynchronous Granular Synthesis. In Representations of Musical Signals, edited by G. De Poli, A. Piccialli, and C. Roads, pp. 143-185. Cambridge The MIT Press, 1991. 

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The authors gratefully acknowledge the valuable contributions of Dr D R Brown (Croxton Garry Ltd, Curtis Road, Dorking, Surrey, RH4 IXA, UK) to the sections on calcium sulfate and wollastonite, of Joseph L Scaries (US Silica Company, PO Box 187, Berkeley Springs, WV 25411, USA) to the section on crystalline silica, and of Mrs Caryl Gould (EGC International, Europe) for the SEM micrographs of mineral fillers. 

The composer Iannis Xenakis is conunonly cited as one of the mentors of granular synthesis. In the 1950s, Xenakis developed important theoretical writings where he laid down the principles of the technique (Xenakis, 1971). The first computer-based granular synthesis system did not appear, however, until Curtis Roads (1988) and Barry Truax (1988) began to investigate the potentials of the technique systematically in the 1970s, in the USA and Canada respectively. 

Pulsar synthesis, as recently proposed by Curtis Roads (2001), shares the same fundamental principles of granular synthesis. The main difference is that the concept of sound grains is replaced by the notion of pulsars. In essence, a pulsar is a sound grain with a variable duty cycle an idea inspired by an analog synthesis effect known as pulse-width-modulation (PWM). More specifically, a pulsar consists of a waveform w (or pulsaret) of duration d followed by a silent portion s (Figure 5.12). The period p of a pulsar is therefore given by the sum of H7 + s, and d corresponds to the duration of its duty cycle. The frequency of a stream of pulsars with period p is calculated as 1/pHz. 

In the folder pulsar in the Macintosh portion of the accompanying CD-ROM there is a demo version of PulsaiGenerator, a terrific pulsar synthesiser implemented by Alberto de Campo and Curtis Roads at the University of California, Santa Barbara. 

Pulsar Generator (or simply PG) designed by Alberto de Campo and Curtis Roads, implements the Pulsar synthesis technique discussed in Chapter 5 it runs on Macintosh computers. 

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