Group-delay based bass management

摘要

An all-pass filter design method for improving audio reproduction within a bass frequency range in a listening room is disclosed. The listening room comprises at least one loudspeaker and at least one listening position. The method comprises: providing, for each loudspeaker, a group delay response to be equalized associated with one pre-defined position within the listening room; calculating filter coefficients for all-pass filter(s) each arranged upstream to one corresponding loudspeaker, the all-pass filter(s) having a transfer characteristic such that the corresponding group delay response(s) match(es) a predefined target group delay response.