Design of a Phase-Linear Digital Audio Equalizer
This paper describes a technique for designing a phase-linear digital audio octave stereo equalizer using a MC6809 microprocessor and a TRW TDC1010 multiplier-accumulator. The digital filter structure is composed of four parallel paths. Each path, consisting of a separate FIR filter implemented by a multiplier-accumulator, processes a distinct, non-overlapping segment of the audio-frequency spectrum. Four paths were chosen to allow the use of fewer coefficients than that required by a single path. The microprocessor is used to control the selection of coefficients for each digital filter in order to obtain an overall desired frequency response selected by the users.
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.