AES Store

Journal Forum

Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
10 comments

Reflecting on Reflections - June 2014
1 comment

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Access Journal Forum

AES E-Library

Analytical Design of Biquadratic Filter Sections for Parametric Filters

Quadratic and biquadratic filter sections are often used in audio applications since only moderate filter selectivities are usually required. When a number of filter sections are cascaded, it can be advantageous to use filters with a nominal stopband gain of unit. The passband of each filter can then be varied about the 0-dB level, thereby realizing a filtering system capable of boosting or attenuating an input signal within multiple frequency bands. New closed-form expressions for analog biquadratic bandpass filters meeting prescribed specifications are first derived. This is followed by a method for transforming conventional analog filters. These results are then extended to the discrete-time domain through the use of the bilinear transformation. A distinct advantage of the proposed method is that since closed-form methods are used, the coefficients of a parametric filter can be readily recomputed in real time in response to a user specifying any of a new center of frequency, bandwidth, or peak gain. Examples of digital filter designs are given in the context of audio-frequency filtering.

Author:
Affiliation:
JAES Volume 40 Issue 11 pp. 876-885; November 1992
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!


 
Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society