The purpose of this paper is to describe a correction implementation of group delay distortion arising from a two-way loudspeaker system crossover. Having determined an IIR all-pass filter having a group delay response corresponding to that of the system crossover to be corrected, we have validated under Matlab and implemented in DSP the time reversal solution proposed by S.A. Azizi,. S.R. Powell and P. M. Chau, enabling an IIR filter to be inversed, whilst retaining stability and causality. In addition to theory and calculation validation, we have also carried out preliminary listening tests, supporting the evaluation of timber modification, sound clarity and space localisation due to the group delay distortion correction.
https://www.aes.org/e-lib/browse.cfm?elib=14096
Click to purchase paper as a non-member 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 and is free for AES members and E-Library subscribers.
Learn more about the AES E-Library
Start a discussion about this paper!