Frequency-Domain Equalization of Audio Systems Using Digital Filters, Part 1: Basics of Filter Design
Digital filters are presented which are designed to equalize frequency-domain characteristics such as, for example, the magnitude and phase responses of analog systems which are parts of combined analog and digital audio signal processing. A unified frequency-domain equalization approach is introduced. Basic filter design principles such as minimax and least-squares filters, tolerance schemes, as well as simultaneous equalization of magnitude and phase responses by recursive and nonrecursive digital filters are studied. Several design methods and available software in the areas of identification, approximation, and optimization methods and available software in the areas of identification, approximation, and optimization are presented. Short commends on the relations between complex approximation and simultaneous approximation of magnitude and phase responses as well as a comparison of phase approximation by recursive and nonrecursive filters are offered. A second part will contain examples and illuminate some important aspects of practical equalization.
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 $33 for non-members, $5 for AES members and is free for E-Library subscribers.