Hey, so I figured I might as well post this in case someone else is looking to see what Dirac is actually doing in terms of room correction by measuring before and after using a UMIK-1 microphone and REW using the Diract Live Room Correction Suite. My setup is two JBL 306P speakers about 2.6 meters from the listening position and about 1.4 meters apart. The speakers are also only 6.5 inches from the back wall and the left speaker is about 12 inches from the side wall (actually, window with curtain).
Here are the measurements for the left speaker in Dirac Live. Yellow is the measured FR and purple is the corrected FR.
Here are the actual measurements for the left speaker in REW (using Var smoothing). Red is without Dirac enabled and orange is with Dirac enabled:
Here is the right speaker in Dirac Live. Yellow is the measured FR and teal (or light blue) is the corrected FR:
Here are the actual measurements for the right speaker in REW (using Var smoothing). Blue is without Dirac enabled and teal (or light blue) is with Dirac enabled:
Just to round out this post, here are my speaker's measurements before any Dirac Live corrections:
Here are the measurements after Dirac Live corrects for bass from ~35 Hz to 500 Hz:
Lastly, here are the measurements when the FR is corrected from ~35 Hz to 20 kHz (I, personally, do not hear a difference between this and the above but that's for another discussion):
I hope this post has been helpful!
As an aside, the other big thing Dirac has fixed in my setup is the timing and gain for better imaging when sitting in the listening position since the speakers are on one side of the room due to living in an open-concept apartment (also, hence, no subwoofer). Of course, that better imaging is gone if moving more than a few inches from the listening position.
Here are the measurements for the left speaker in Dirac Live. Yellow is the measured FR and purple is the corrected FR.
Here are the actual measurements for the left speaker in REW (using Var smoothing). Red is without Dirac enabled and orange is with Dirac enabled:
Here is the right speaker in Dirac Live. Yellow is the measured FR and teal (or light blue) is the corrected FR:
Here are the actual measurements for the right speaker in REW (using Var smoothing). Blue is without Dirac enabled and teal (or light blue) is with Dirac enabled:
Just to round out this post, here are my speaker's measurements before any Dirac Live corrections:
Here are the measurements after Dirac Live corrects for bass from ~35 Hz to 500 Hz:
Lastly, here are the measurements when the FR is corrected from ~35 Hz to 20 kHz (I, personally, do not hear a difference between this and the above but that's for another discussion):
I hope this post has been helpful!
As an aside, the other big thing Dirac has fixed in my setup is the timing and gain for better imaging when sitting in the listening position since the speakers are on one side of the room due to living in an open-concept apartment (also, hence, no subwoofer). Of course, that better imaging is gone if moving more than a few inches from the listening position.
