Home Studio Treatment - Measurments and Questions

[ddude003]

If you can mount them hanging 3 to 5 inches from the ceiling you may get even more of an affect... And now all these things accumulate...

 

[fiskmaas]

Moved it down a bit from the ceiling, 10-12 cm. 1/3 of ceiling is now treated. Starting to sound pretty good!

Attached R,L and R+L measurments.

 

[ddude003]

Looking better... Sounding better... This might be the time to use a little EQ to push that peak of 130Hz down a little bit, and as @DanDan suggests, try a room/house curve...

Of course you can continue to add more bass absorption, broad band absorption, as well as diffusion to your taste...

 

[fiskmaas]

Yeah, thanks a bunch @ddude003 ! Finally getting some results. EQ already sounding much better than before.

Harman curve isn't all that far off, just need to add a sub now.

 

[ddude003]

Your welcome @fiskmaas... Now that your room is a little more tame adding EQ can work better... Nice job... You might want to try the Bruel and Kjaer curve too...

Personally I use a modified Bruel and Kjaer curve, its just not as steep, to create FIR filters for a convolution engine as a baseline... Then I add either a Massive Passive or 8200 EQ to season to taste...

 

[fiskmaas]

Is there any pros to using convolution over just regular eq?

 

[ddude003]

Is there any pros to using convolution over just regular eq?

Now you've gone and opened an entire can or worms... Google is your frenemy...

I highly recommend this video... Mitch will take you down the rabbit hole...

And this thread for a taste of some of the convolution engines available... https://www.audiosciencereview.com/...ds/a-comparison-of-convolution-engines.43290/

 

[fiskmaas]

Ah, yeah I watched that, I think it was a part of one of the articles you linked earlier. I discarded it though because acourate was pretty expensive.
I see now though that there's a tutorial for Audiolense too, so definitely going to give it a go.

 

[ddude003]

In the conclusions towards the end at 1:45:10 Mitch hits the jackpot...

There are many choices in filter creation tools including REW+rePhase, as well as many choices of convolution engines...

 

[fiskmaas]

Ended up finding a good youtube guide for using just REW. Now my speakers are actually starting to match my corrected headphones too, this is great.

 

[DanDan]

Well done, carry on. I think a sloped response is vital, and I will just add that I tried everything here in a Studio House for a couple of years. Every variation possible. I was able to compare the highly treated Control Room to different systems in different domestic rooms immediately. I ended up with my own curve which is really almost identical to the Bruel and Kjaer. Those curves slopes are a thing.

 

[fiskmaas]

Thanks!

Is there a way around the delay created on playback btw? I tried decreasing the interface buffer but it's not really viable when mixing.

 

[ddude003]

Will need a little more information about your kit... What DAW? What EQ, Plugin or? What computer? Any other analogue in the loop?

 

[fiskmaas]

Will need a little more information about your kit... What DAW? What EQ, Plugin or? What computer? Any other analogue in the loop?

The delay is caused when using a convolution engine.

Just using a Windows computer, Equalizer APO as Convolution.

In the DAW (Reaper) I tried both Melda MConvolutionEZ and EasyConvolver from GenuineSoundware. All causing delay.

Actually not that big of an issue in the DAW, although annoying, it's not as bad as watching video, where it just desyncs the clip from the audio.

Edit: I mean it even says there's latency in EQ APO. Not sure if it's normal or if I did something wrong. Attached the IR too.

I'm also noticing a delayed ghost playback of my audio when i pause playing sometimes. I followed this guide to make the impulse responses:

 

[ddude003]

Hi @fiskmaas... Thank you for the information... If I remember correctly, there is a function in the Impulse window (Actions) which will, for lack of a better name, "trim" the IR... Estimate IR Delay... Then Shift IR or Shift and update... See if that helps... You could also use a .wav editor and see how much "head" and "tail" is in the .wav file and do some trimming there...

BTY, how does it sound?

 

[fiskmaas]

Thanks, editing the wav did the trick!

I mean it's never been this good... and I was even moved to tears for a moment yesterday.

The bass response is the most impressive I think, evening it out made a massive difference, even without a sub. Can't even imagine what a sub is gonna do.

 

[ddude003]

It is pretty incredible what you can do with some acoustic treatments and a little DSP... Now that you have gained this experience and hear the results, try a few different house curves to get a nice baseline Room Correction EQ... Then layer a nice parallel passive equalizer emulation on top... Something like the Manley or GML... Have fun...

 

[fiskmaas]

Yeah, thanks, appreciate all the help and guidance. It's been very enlightening.

Going to figure out the front wall first I think, the center is panned a bit to the left I'm noticing. Not sure if it's the traps or the window, or maybe just a level thing. Will have to experiment.

 

[ddude003]

You very welcome @fiskmaas... It has been my pleasure working with you... You know that you can adjust your speakers by 1/8th of an inch, forward, backward, toe in, toe out and it will make a difference to your balance, imaging and soundstage... Little adjustments add up and you can come back every day for the next month and tweak some more...

 

[fiskmaas]

Yeah that helped. I moved them further out towards the side walls and moved the mix pos back a bit too. So much more even across the channels now, and 130hz peak more or less eliminated.

 

[ddude003]

It looks like its time to regenerate your filters and hear how it turns out... Lol...

 

[fiskmaas]

I did yeah. The midrange is a lot more clear now and image is properly centered, which I think is what cleared things up the most. Low mids were just a muddy mess before. Also moving the desk back eliminated a lot of reflections. Getting better and better.

 

[thothsong]

FWIW, a few things I notice in your latest mdat. The L measurement for some reason has a very high noise floor. There's an R reflection at 4ms (seen in Impluse ETC) that might be worth investigating. Look at the RT60 Decay for R in the 450-800 Hz range. You generally have very good Clarity metrics, but note the Clarity dips for R at 100 Hz and ~630 Hz.

 

[fiskmaas]

FWIW, a few things I notice in your latest mdat. The L measurement for some reason has a very high noise floor. There's an R reflection at 4ms (seen in Impluse ETC) that might be worth investigating. Look at the RT60 Decay for R in the 450-800 Hz range. You generally have very good Clarity metrics, but note the Clarity dips for R at 100 Hz and ~630 Hz.

Hey, thanks for the feedback. Yeah I noticed the 4ms spike. The R 400-800hz is an anomaly, it doesn't always show up. The 4 ms spike I'll have to check though. 4ms spike seems to be first side reflection on left side. The fabric is pretty thick on the absorber, I think I'll have to get something more acoustically transparent for those.

Here are some more measurements.

 

[DanDan]

Might be worth remembering that a body near the mic can cause a significant reflection ................