AES Milan 2018
Tutorial T17
Thursday, May 24, 17:00 — 18:00 (Scala 3)
T17 - Use of Delay-Free IIR Filters in Musical Sound Synthesis and Audio Effects Processing
Presenter:Federico Fontana, University of Udine - Udine, Italy
The delay-free loop problem appears when an audio electronic system, typically an analog processor, is transformed in the digital domain by means of a filter network preserving the structural connections among nonlinear components. If such connections include delay-free loopbacks then there is no explicit procedure allowing for the computation of the corresponding digital filter output.
The tutorial will show how a delay-free IIR filter network is designed, realized, and finally computed; and why they have led to successful real-time digital versions of the Dolby B, the Moog and EMS VCS3 voltage-controlled filter, as well as nonlinear oscillators and RLC networks, magnitude-complementary parametric equalizers, and finite-difference time-domain scheme-based models of membranes characterized by low wave dispersion.
 | This session is presented in association with the AES Technical Committee on Signal Processing |