Digitally-Controllable Audio Filters and Equalizers

Digitally-Controllable Audio Filters and Equalizers (728k)
By Gary K. Hebert and Fred Floru, THAT Corporation
Paper 13-031, AES 13th International Conference, December, 1994

This paper explores solutions to varying the response of filters and equalizers using digital control techniques suitable for computer-controlled systems. High-pass, low-pass, band-pass, and parametric topologies are covered using VCAs, resistor ladders, and multiplying DACs as control elements.