I set about doing this by measuring with REW, selecting a peak or valley center frequency, applying a gain or cut to level it out, and then using the width parameter to narrow or expand the band to match the REW measurement. With the REW mic in place from my Dirac measurements, it was a simple process to create filters to flatten out the bass response. Since I have been in the purist camp for many years, I have not used PEQ in my system.
So for Preset 1 and 2, you are back to measuring speaker distances and using an SPL meter for levels. The XMC-1 and Dirac provide no information concerning the trims and distances applied. I attribute these discrepancies to mic/calibration file issues and not anything to do with Dirac or the XMC-1. Given the measurement and target curve, Dirac applied appropriate corrections. Below that, both show a bass hump and mid bass dip, although to a lesser degree with REW. The Dirac and REW measurements are completely out-of-sync above 400 Hz. Above 1 kHz, the correction ranged from 0 to about 5 dB. There is a mid-bass boost of 5 to 10 dB between 100 Hz and 300 Hz.
The Dirac default target curve has reduced the bass by 10 dB and that does a good job flattening the bass response. The red trace is the XMC-1 in Reference Stereo mode (no processing) and the blue trace is Dirac Live using the default curve. The average response taken with the same mic positions used for Dirac are shown below. There is a similar 10 dB drop in the 100 Hz to 300 Hz band followed by modest peaks and dips and a gradual decline in high-frequencies. The Dirac EMM-1 measurements show significant variation in the lower bass with up to 12 dB peaks. The charts below show the EMM-1 Dirac (DLCT) measurements, default target curve, and predicted results (labeled Avg. The XMC-1 comes standard with the Emotiva EMM-1 microphone and with a universal calibration file. Dirac Live Calibration Tool (DLCT) Measurements The 9 Dirac position measurements were then averaged. The low mic height was set to 38 inches and the high mic height at 47 inches. The measurements spanned a 3-foot wide by 14 inch deep area roughly matching the seating positions of my love seat. My shorthand labels for these positions are: Using the Dirac DLCT sofa graphic, I labeled the nine recommended positions to simply the measurement process during repeated measurements (eliminating the need to switch the graphic between Top, Front, and Oblique views). The Emotiva supplied EMM-1 USB microphone was used for the Dirac calibration and for the corresponding REW measurements.
#MICROPHONE FOR DIRAC LIVE SOFTWARE#
For that, many use other measurement software such as Room EQ Wizard (REW available at ) for feedback. Still have my Trinnov processor for multi channel.Dirac provides detailed measurements data but it does not provide the ability to measure and display the actual results after calibration. The way it stands right now, I'll just forgo DRC completely, at least for 2 channel. On Trinnov, there is always a clear difference between engaging DRC and bypassing it.Īm I doing something wrong? I'm very puzzled. I am 100% sure I could not pick out a preference I was doing this blind. First, I honest to God barely noticed a difference between any of the filters, and no filters at all.
Then kicked back, played some music, switching filters in real time and switching filter on/off to compare DRC with no DRC. Then created three filters įilter one: +5db to 0db in 20Hz-200Hz range, flat in 200Hz - 1Khz range and 0dB to 5db in 1Kzh to 20Khz range - this is pretty much the same target curve I am using on my Trinnovįilter two: +5db to 0db in 20Hz-300Hz range, no correction at all on anything above 300Hz I have been using Trinnov, but wanted to simplify my signal path and am running USB into the MSB DAC, rahter than doing USB to AES/EBU conversion to be able to go through the Trinnov, So I finally got around to setting up Dirac live, do measurements and create some filters.