My room is
9' 5" wide
15' 4" long
7' 10" tall
Obviously this is not ideal. I had Aurolex do a simple design and bought what they recommended for acoustical treatment. I have diffusers on the ceiling at the first reflection point above my head and on the back wall. Also have acoustical 2x2 tiles all over the walls and ceilings, as well as 6-8" corner bass traps.
Below is a few pics of the room measurements and it looks terrible! Everyone knows eq won't fix this. Any advice? The first pic is of two event 20/20, the 2nd is Presonus scepter 8.
Fix this crap hole!
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mbresch
- Posts: 17
- Joined: Tue Apr 28, 2015 5:22 am
- Location: Iowa, USA
Re: Fix this crap hole!
Couldn't figure how to upload multiple files, so here's 2
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mbresch
- Posts: 17
- Joined: Tue Apr 28, 2015 5:22 am
- Location: Iowa, USA
Re: Fix this crap hole!
3rd pic
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Soundman2020
- Site Admin
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Re: Fix this crap hole!
You are only showing a couple of over-smoothed, full-spectrum frequency response curves for the room, which is just a small part of the overall acoustic response. I would need the actual impulse response data to be able to analyze it and come to useful conclusions, along with full details of the room, including layout, speakers, geometry, materials, furniture, equipment, etc.
Please repeat your test using the REW software (free) with a good measurement mic located exactly at the mix position, pointing directly forwards, angled up at 60°, and with the system calibrated at 85 dBC (not the 75 dBC suggested by the REW manual) using a hand-held sound level meter for the calibration. Include both the mic calibration file and the sound-card calibration file. Do three tests in the same data file; one with just the left speaker running, one with just the right speaker running, and one with bot speakers running. Label each test, to avoid confusion. The resulting MDAT file will be too big to upload to the forum, so upload it to some place like DropBox and just provide a link here.
From the small amount of info that can be gleaned from that those frequency response graphs, it seems that your room is behaving like a typical small room that has insufficient bass trapping, and poorly located speakers and mix position, probably with some furniture related issues (desk? racks?). There appears to me both modal activity, and SBIR issues, as well as reflections off a surface between the mic and the speakers, likely the desk or console.
However, that's just a rough estimate based on very limited information and some intelligent assumptions. It could be wrong. Only the complete acoustic data sett can tell the full picture.
Some of those issues can be fixed relatively easily, some of them with greater difficulty at higher cost, and some cannot be fixed at all (or only ameliorated slightly), since they are imposed by the small size of the room (especially the low ceiling). And some actually can be fixed, or at least moderated, through correct parametric EQ, but only if the room is fully treated acoustically first. Many people make the mistake of trying to EQ a room that has little to no treatment, or incorrect treatment. That's a recipe for failure. Limited EQ can be used under certain specific conditions, for certain specific frequency ranges, which will become apparent from the acoustic test data. You can only successfully use EQ where you have minimum phase conditions, or close to it, implying that the rate of phase change is close to the lowest that it can be.
The good news is that the worst offenders can be fixed, either acoustically or afterwards with careful intelligent use of parametric EQ. The bad news is that it will take time, and money, and careful analysis, design, and implementation. A "one size fits all" kit cannot do the job, if you want an accurate room. It can help a bit, but it cannot get you where you want to go.
I will also need pictures of the room, aiming in all directions, so I can see how it is set up currently, as well as the technical data of your speakers: make, model, location, angle, height. If I need more info, I'll ask.
If you provide all that, I'll be able to take a look later in the week and see what the prognosis is.
- Stuart -
Please repeat your test using the REW software (free) with a good measurement mic located exactly at the mix position, pointing directly forwards, angled up at 60°, and with the system calibrated at 85 dBC (not the 75 dBC suggested by the REW manual) using a hand-held sound level meter for the calibration. Include both the mic calibration file and the sound-card calibration file. Do three tests in the same data file; one with just the left speaker running, one with just the right speaker running, and one with bot speakers running. Label each test, to avoid confusion. The resulting MDAT file will be too big to upload to the forum, so upload it to some place like DropBox and just provide a link here.
From the small amount of info that can be gleaned from that those frequency response graphs, it seems that your room is behaving like a typical small room that has insufficient bass trapping, and poorly located speakers and mix position, probably with some furniture related issues (desk? racks?). There appears to me both modal activity, and SBIR issues, as well as reflections off a surface between the mic and the speakers, likely the desk or console.
However, that's just a rough estimate based on very limited information and some intelligent assumptions. It could be wrong. Only the complete acoustic data sett can tell the full picture.
Some of those issues can be fixed relatively easily, some of them with greater difficulty at higher cost, and some cannot be fixed at all (or only ameliorated slightly), since they are imposed by the small size of the room (especially the low ceiling). And some actually can be fixed, or at least moderated, through correct parametric EQ, but only if the room is fully treated acoustically first. Many people make the mistake of trying to EQ a room that has little to no treatment, or incorrect treatment. That's a recipe for failure. Limited EQ can be used under certain specific conditions, for certain specific frequency ranges, which will become apparent from the acoustic test data. You can only successfully use EQ where you have minimum phase conditions, or close to it, implying that the rate of phase change is close to the lowest that it can be.
The good news is that the worst offenders can be fixed, either acoustically or afterwards with careful intelligent use of parametric EQ. The bad news is that it will take time, and money, and careful analysis, design, and implementation. A "one size fits all" kit cannot do the job, if you want an accurate room. It can help a bit, but it cannot get you where you want to go.
I will also need pictures of the room, aiming in all directions, so I can see how it is set up currently, as well as the technical data of your speakers: make, model, location, angle, height. If I need more info, I'll ask.
If you provide all that, I'll be able to take a look later in the week and see what the prognosis is.
- Stuart -