I finally got around to putting the pieces together to get Convolver working with rec_imp and DRC - Thanks John and Ed !!
I will put up some more details on the DRC wiki in the next few days, but I am still experimenting. I get a noticable change, which sounds a little 'muffled' , and am now experimenting with flat target curves in DRC to lift the top end. My results are not as dramatic as I read "Jones" had - but I have high hopes!!
I am using MCE2005 with WMP10 and Convolver, DRC and rec_imp all latest and greatest releases. My sound card is an M-Audio Transit USB set to bit-perfect passthrough, 44100, 16bit and I am using the ASIO4ALL driver (could not get right levels of latency using the m-audio drivers, which resulted in 'cracking' sounds during the sweep). My microphone is probably a weak link - am using a Radio Shack boundary mic (next stop I will try to correct for the mic).
All of this feeds via S/PDIF into a Marantz 5200 and then to 6.1 B&W (600 series) speakers. I set the Marantz to play 6 channel stereo for my tests (which is independant of this experiment).
The following uses rec_imp to measure 2 channel - a Left then a Right sweep to build left and right files for convolver via DRC.
My batch file looks like this:Set REC_IMP=c:\\Program Files\\DRC\\Rec_Imp
Set DRC_DIR=C:\\Program Files\\DRC\\DRC
Set CONVOLVER=c:\\Program Files\\DRC\\Convolver
rec_imp.exe LeftSpeakerImpulseResponse.pcm 44100 20 21000 20 0:1 0:1
move /y LeftSpeakerImpulseResponse.pcm "%DRC_DIR%"
rec_imp.exe RightSpeakerImpulseResponse.pcm 44100 20 21000 20 1:1 1:1
move /y RightSpeakerImpulseResponse.pcm "%DRC_DIR%"
drc.exe --BCInFile=LeftSpeakerImpulseResponse.pcm --PSPointsFile=bkHB.txt --PSOutFile=LeftSpeaker-rpsERB.pcm erb.drc
move /y LeftSpeaker-rpsERB.pcm "%CONVOLVER%
drc.exe --BCInFile=RightSpeakerImpulseResponse.pcm --PSPointsFile=bkHB.txt --PSOutFile=RightSpeaker-rpsERB.pcm erb.drc
move /y RightSpeaker-rpsERB.pcm "%CONVOLVER%
I have modified the PSPointsFile to be Flat (I think!):
And my convolver config file is:44100 2 2 0
Note that I am using the ERB config file for DRC - just an experiment at this stage to try to 'lift' the higher frequencies.
I am not there yet, but the batch file make it easier for me to conduct my experiments.
I would appreciate any input on the above !