WDR Control Room 7 and integrated subwoofer RIRs

[capoei]

WDR Control Room 7 has a terrible low frequency response. it's very muddy with loud extended reverbs. very, very diferent from what you would expect from a professional control room. I suppose that is due to the integrated subwoofer RIRs. Is there any way to get this subwoofer filter so that I can undo it's efect on the BRIR?
not sure if this aplies as an issue. It's just that the result is not a control room response.
I ran a channel of a 30 degrees filter through REW to show how bad the low end is:

https://drive.google.com/open?id=1cFESB_NmGR9EV0cHYUCh13z8WleyPZNu

might be an issue on other rooms, too. I'm focused on this because I love the (rest of the) overall response of it

[ShanonPearce]

Hi Capoei,
Thanks for the feedback. I looked into control room 7 along with 2 other rooms (control room 1, listening room) which utilised the same subwoofer RIR, and I can see the same issue you are referring to. It is due to the subwoofer RIR as the problem area falls within its frequency range (approx. 20-120Hz).

I attempted to improve the magnitude and phase response of the subwoofer response using the original BRIRs as a reference and have updated the dataset with the results. Please let me know if there is an improvement to the low frequency response.

If you are interested in analysing or improving the subwoofer RIR, here is a link to the new and previous versions of the IR in WAV format. I have also included raw BRIRs (without EQ) for control room 7 for reference.
https://drive.google.com/drive/folders/1WEuppzT1dlzJK7V-8aT_lH59Xoz53kRf?usp=sharing

[capoei]

Hi. just giving some feedback. Thanks a lot. I have been trying things out with the no eq files the whole day. leave this open, please.

[capoei]

Hi. check out my EQing. not so sure about the result. I need some fresh ears. tell me what you think

https://drive.google.com/open?id=1C1ySvQV5SpEjBAB6O04k8ebqFHTKJjFC
https://drive.google.com/open?id=1Tay8AFSfsNbfEUTVTJFLhTV520Jxj0u7

EDIT: balance is still off. +30 needs about 3dB reduction

[capoei]

unfortunatly even the unequed IRs are full of problems in the low end. not sure if their room was poorly treated or why.
I also think there must be a way to edit the reverb out of those ringing frequencies. I mean, they are in the IR. So there must be a way to take them out. have not put much thought into this yet.
Also could you tell me how you create those virtual rooms? I am interested in creating one of my own.

[capoei]

Do you think If adding a 30 and a 45 degree IR I get 37.5 degrees? I think 30 is a little too steep (yea, I know it's the text book stereo triangle), and 45 is too wide

[capoei]

hearing the equing you did you might like these more. they have a B&K house curve; going linear down above 100Hz and end -6dB at 20.000
https://drive.google.com/open?id=1M9Qzjv-fVNAGdyq1vSQxEmjjHf9eCi95
https://drive.google.com/open?id=1CTamGlfUh7aTV1OB8ErnfIHQdrQGWpX6

[ShanonPearce]

Do you think If adding a 30 and a 45 degree IR I get 37.5 degrees? I think 30 is a little too steep (yea, I know it's the text book stereo triangle), and 45 is too wide

I will add more azimuths to the dataset so that you can select one closer to your preference. Adding the two IRs together would not be ideal.

unfortunatly even the unequed IRs are full of problems in the low end. not sure if their room was poorly treated or why.

It could be due to a number of reasons including the acoustics of the room, the ability of the speakers to produce low frequencies, low signal to noise ratios, or even the measurement system.
The paper from the anechoic measurements mentions some reasons as well.

[capoei]

great to see the more azimuths.
I have been playing around with demo version of lots of paid room simulations over the week.
man, a lot of crap out there which doesn't even "takes the sound out of your head".
The Abbey Road Studio 3 and New Audio Technology Spatial Sound Card Pro made me interested at first. but in the end they kind of suck, too. And while they seam to use BRIRs, they don't get to sound like real speakers like your dataset. While I'm not sure, if I realy want that perfect simulation or a perfect stereo field with perfect reflections, they colorize too much anyways.
At the moment I am playing around with Toneboosters Isone 3, which is the only algorythm based solution wich kind of creates the speakers effect. But I guess I will come back to your database in the end.
BTW: I found out that waht I did with my IRs was wrong. I added the IRs of the room to the convolution filter I created with DRC. It produces aritfacts. I guess the two IRs can't be processed at the same time. I also will play around more with the raw IRs you sent me and DRC.
could you upload the 35 degrees no-EQ versions of Room 4?
have an nice weekend

[ShanonPearce]

The no-EQ versions of room 4 were exported from the original miro data structures after resampling from 48kHz to 44.1kHz. The same BRIRs should already be available in WAV format in the original dataset .

If you are having trouble with equalising the BRIRs, any convolution filters you create with DRC should be convolved with each channel of the BRIR or alternatively with the input/output channels if you are using Equalizer APO. As for the azimuths, more azimuths are available in the dataset I linked.

Thanks again for the feedback.

[capoei]

I had a look at the original dataset before and got very confused.
"WDR CR7_KU [*.WAV]" is the download I need, right? But I don't understand the name of the waves it contains.

[ShanonPearce]

Thats the correct download.
In the 'CR7_KU_MICS_L_WAV' folder, the file with 'IR33' in the name should be (approximately) the 0 degree azimuth BRIR for the left speaker.
In the 'CR7_KU_MICS_R_WAV' folder, the file with 'IR334' in the name should be the 0 degree azimuth BRIR for the right speaker.
The IRs increment by 1 degree each so add or subtract from that number to rotate the head and find the desired azimuth. Note that it wraps around after 360 deg.

[capoei]

I worked weeks on "room correcting" and frequency extending the WDR CR7 IRs. And yes, it is much "dryer" now. I think it sounds very good (the clipping ocured at ACC encoding stage. wont redo it for this simple demonstration):

https://www.youtube.com/watch?v=3PrRXjyarpg
https://www.youtube.com/watch?v=hXVMAu5Fn6M

[capoei]

I created correction filters against the stereo mic (Mk2) IRs and then aplied them to the binaural IRs.
"minimum phasing" the IRs in REW at all stages before any convolving is very important.
Also minimum phasing the final IR with a limited 200ms window in REW takes care of the ringing