I am posting files to facilitate ABX testing for the types of phase distortions caused by crossovers. I have acquired samples that are royalty free, and that I find to be of good quality. I am not claiming that these are the ideal files to reveal differences, nor am I claiming that I have successfully differentiated between them in ABX testing. I have performed preliminary ABX testing only to verify that the files should support such testing. I'm in my forties now, and I don't like my chances.
The files are matched in duration, and are matched in level to within a couple hundredths of a dB or better. The only meaningful difference between matched files should be the phase response. I had to put them in flac format to get under the forum file size limit.
I have included spectral plots of the files, comparing the magnitude of the original and phase distorted versions. I have also included phase and group delay plots for the filters being applied.
I applied the phase distortion associated with a 4th order 100 Hz crossover to a kick drum, and to a piano strike. The piano strike is rich in harmonics, while the kick drum is not.
I applied the phase distortion associated with a 4th order 2000 Hz crossover to a cymbal crash.
I included both of the allpass filters so that interested parties can use them to generate additional files for ABX testing, if anyone is so inclined.
I have seen many people claim that when phase correction is applied to a system (typically a speaker system), then everything magically falls into place and the experience is enhanced dramatically. Personally, I don't find anything dramatic about the phase distortion associated with typical crossovers, whether in the sub-to-satellite frequency range, or in the woofer-to-tweeter range. What do you think?
The files are matched in duration, and are matched in level to within a couple hundredths of a dB or better. The only meaningful difference between matched files should be the phase response. I had to put them in flac format to get under the forum file size limit.
I have included spectral plots of the files, comparing the magnitude of the original and phase distorted versions. I have also included phase and group delay plots for the filters being applied.
I applied the phase distortion associated with a 4th order 100 Hz crossover to a kick drum, and to a piano strike. The piano strike is rich in harmonics, while the kick drum is not.
I applied the phase distortion associated with a 4th order 2000 Hz crossover to a cymbal crash.
I included both of the allpass filters so that interested parties can use them to generate additional files for ABX testing, if anyone is so inclined.
I have seen many people claim that when phase correction is applied to a system (typically a speaker system), then everything magically falls into place and the experience is enhanced dramatically. Personally, I don't find anything dramatic about the phase distortion associated with typical crossovers, whether in the sub-to-satellite frequency range, or in the woofer-to-tweeter range. What do you think?