Can't remember from the top of my head. I will have to look up if and what data I stored to disk the last time.
How to use Room Correction?
- Thread starter MCG555
- Start date
slartibartfast
Major Contributor
- Joined
- Apr 18, 2024
- Messages
- 1,839
You were right about Q being 0.707 for fixed Q filters
Fernandodelae
Member
Trying to be helpful and I appreciate the attached probably has way too much detail, but if you look at the graph your Polk T15 already start to roll off at 100Hz and have a big dip in the 3-6k range. So I’d suggest you are more realistic and look at low of 90Hz to 4-6Khz range see how that works, the speakers cannot handle corrections down to 40Hz.
As another member mentioned, to be honest for a 40Sqm room you are asking a lot.
Polk T15 Bookshelf Speaker Review
This is a review and detailed measurements of the Polk T15 "Home Theater and Music Bookshelf Speaker." I purchased it last month. The T15 is supposed to cost US $115 but I think I only paid US $70 for my pair. With the grill removed, the T15 looks decent: I was surprised by the quality...
I tried the RC feature 2 more times, adjusting the settings from 60hz to 4khz as the manual indicates and changed the target curve to Harman, and results are much, much better! I actually kept this new curve which provides much wider range, better bass and doesn`t kill the treble like the previous exercises.
. Considering my very open living room and my entry level speakers, this is a considerable upgrade. thanks for the Forum members for your patience and wise suggestions.
Thanks for the friendly feedback!I tried the RC feature 2 more times, adjusting the settings from 60hz to 4khz as the manual indicates and changed the target curve to Harman, and results are much, much better! I actually kept this new curve which provides much wider range, better bass and doesn`t kill the treble like the previous exercises.
Observations from the sideline (since I remain in a purely Android household):
- Every post (or at least those with odd graphs) should be asked: How did you orient your phone?? The main microphone on all modern iPhones is on the bottom beside the Charging Port. So, shouldn't one be holding the phone glass-up with top pointed at your chin and bottom pointed at the center between the speakers?? Not even WiiM's Room Correction FAQ shows this...
- The same FAQ reminds user to take Phone Case off (but should list this in ALLCAPS).
- For iPads, all bets are off...
landco
Member
Until WiiM provides the ability to connect a normal omnidirectional measuring microphone, you will continue to struggle with the orientation of the phone, all these endless questions about cases and other nonsense
Brantome
Major Contributor
- Joined
- Oct 20, 2022
- Messages
- 6,842
They do
Post in thread 'Room correction'
https://forum.wiimhome.com/threads/room-correction.3850/post-59753
CrystalGipsy
Senior Member
- Joined
- Sep 13, 2023
- Messages
- 264
They just don’t support calibration files so makes it all a bit moot until they do.
slartibartfast
Major Contributor
- Joined
- Apr 18, 2024
- Messages
- 1,839
Doesn't mean they won't. If they support external mics they will have to. Using a calibration file is probably the simplest part of the whole process.
If you do RC it shows you in the process what and how you should do it…
Probably a good idea to use a clamp tripod, not holding phone/tablet with your hands, to get your body interactions out of the way of measurements.
Brantome
Major Contributor
- Joined
- Oct 20, 2022
- Messages
- 6,842
Why? Your body is there when you listen (albeit not clamped
) , surely measuring its impact is important?Why? Your body is there when you listen (albeit not clamped
afiak the body can interfere with microphone reading heartbeart etc? I noticed slight difference with a spl meter a while back so I just used a tripod.
Could be verified with tripod/human frequency response...
Fernandodelae
Member
It depends on the phone, for example for iPhones 12 or later they also have mics at the top of the top of the screen so for these you can hold the phone any way you like.
CrystalGipsy
Senior Member
- Joined
- Sep 13, 2023
- Messages
- 264
It makes a big difference from my experience, readings using locked off mic with me out of the way made a big difference to how it measured and how it sounded after correcting. With me out of the picture better all round.Why? Your body is there when you listen (albeit not clamped
Someone must have answered this already, but are you supposed to move the phone/mic around to multiple points?
CrystalGipsy
Senior Member
- Joined
- Sep 13, 2023
- Messages
- 264
Yes not sure what the Wiim one does as I have not used it as it’s in a room I don’t use a lot but I use RC via other means and it’s always multiple readings to get a more balanced view of the room. You should take measurments from a number of different locations around the sweet spot usually basing it on a cube. Main listening position first then rest at same distance around it if possible. Dirac asks for about 9 but you can get away with less. I usually do 6.
And what are you doing with the different measurements?
Depending on the room correction system it can perform multi seat correction.
Dirac does the calculations
