1996 MARCH, VOLUME 44 NUMBER 3

Journal of the Audio Engineering Society

CONTENT

PAPERS

Design and Validation of a System for Selecting Optimized Midrange Loudspeaker Diaphragm Profiles
G. P. Geaves p.107
Midrange axisymmetric loudspeaker diaphragm profile designs are computer generated based on mechanical filter criteria. Mechanical variations are accommodated by a smoothness optimization protocol system that accounts for manufacturing tolerances.

MIDAS-MILAN: An Open Distributed Processing System for Audio Signal Processing
Ross Kirk and Andy Hunt p.119
An open signal processing protocol, which is based on the portability of C software functions, creates a networking system that can be composed of different machine types. This heterogeneous system accommodates different kinds of processors to form a coherent, machine-independent network.

Group Synthesis with Genetic Algorithms
Ngai-Man Cheung and Andrew B. Horner p.130
Musical sounds can be efficiently synthesized using an automatic genetic algorithm to decompose musical instrument tones into group synthesis parameters. By separating the data into individual matrices, a high degree of data compression with low computational cost is achieved.

ENGINEERING REPORTS

Performance of Cascade and Parallel IIR Filters
Wei Chen p.148
The performance of second-order-section IIR filters in digital signal processing applications is materially affected by their configurations. To achieve a signal-to-noise ratio of more than 96 dB, double precision internal states are used together with a parallel form of filter. In general, the parallel IIR filter produces a lower noise figure than its equivalent cascade filter.

STANDARDS AND INFORMATION DOCUMENTS

AES Standards Committee News p. 159
100th Convention meetings

FEATURES

AES 100th Convention Preview: Copenhagen p. 162
Calendar p. 164
Exhibitors p. 166
Exhibitor Previews p. 170
Updates and Corrections to the 1995/1996 AES International Sections Directory p. 206

DEPARTMENTS

Upcoming Meetings p. 200
News of the Sections p. 201
Sound Track p. 205
Available Literature p. 207
Membership Information p. 209
In Memoriam p. 213
Audio Engineering Society Application Instructions p. 214
AES Special Publications p. 217
Sections Contacts Directory p. 221
AES Conventions and Conferences p. 224