The combination of full range drivers and convolution based correction can potentially make for a system which is simple and well behaved from both a frequency and time domain perspective. The provided guide however, will help anyone improve the sound of their system, regardless of their chosen loudspeaker type, using free software and a minimum of hardware. This guide assumes the use of a PC as the source, however, it is possible to hear the potential improvements afforded by this method by preprocessing music tracks with correction filters and burning to a CD.
Dropbox - Room Correction.zip
After downloading and unzipping the attached file, you will find a text guide to get you on your way. This guide is not meant to be a substitute for the instruction manuals of the software programs that will be used, but I have tried to articulate the steps in a manner that might be understandable to someone for whom these processes are unfamiliar.
A good starting point with the standard configurations might be "minimal.drc" with the following edits: PTType = N, and PSPointsFile = BK-2-44.1.txt (this file must be copied from drc-3.2.2/source/target/44.1 kHz to drc-3.2.2/sample). This will give modest correction strength and a traditional "tilted" target frequency response.
Dropbox - Psycho Filter.zip
From the PsychoFilter "readme" file:
This correction method uses two passes through DRC per channel (necessitating the use of two configuration files). During the first pass (prefiltering), the excess phase portion of the impulse response is removed, the remaining (minimum phase) portion is windowed with a frequency dependent length of approximately 3.6 cycles (1/5th octave resolution), and mic calibration is applied. During the second pass, the spectral envelope of the prefiltered impulse response is calculated with Bark scale resolution, inverted, and a target frequency response is applied.
Dropbox - Room Correction.zip
After downloading and unzipping the attached file, you will find a text guide to get you on your way. This guide is not meant to be a substitute for the instruction manuals of the software programs that will be used, but I have tried to articulate the steps in a manner that might be understandable to someone for whom these processes are unfamiliar.
A good starting point with the standard configurations might be "minimal.drc" with the following edits: PTType = N, and PSPointsFile = BK-2-44.1.txt (this file must be copied from drc-3.2.2/source/target/44.1 kHz to drc-3.2.2/sample). This will give modest correction strength and a traditional "tilted" target frequency response.
Dropbox - Psycho Filter.zip
From the PsychoFilter "readme" file:
This correction method uses two passes through DRC per channel (necessitating the use of two configuration files). During the first pass (prefiltering), the excess phase portion of the impulse response is removed, the remaining (minimum phase) portion is windowed with a frequency dependent length of approximately 3.6 cycles (1/5th octave resolution), and mic calibration is applied. During the second pass, the spectral envelope of the prefiltered impulse response is calculated with Bark scale resolution, inverted, and a target frequency response is applied.
Last edited: