Design and implementation of a digital audio tone control unit using an efficient FIR filter structure

In the present multimedia systems the audio tone control unit is implemented in analogue form. We present an efficient FIR filter structure with low computational complexity for a digital audio tone control unit. The algorithm is successfully implemented in the TMS320C50 and TMS320C30 for CD-players and PC multimedia systems. The interfaces for parameter adjustment are also presented. Compared with the analogue form, the digital tone control unit has better performance and lower cost.