Help! Is my room okay? (Rew results, this time with proper mic)

[Darkdays]

Hey! Making a new thread so people don't have to read through the other thread of me learning that I need a proper measurement mic, even a cheap one.
Done that, now I've measured with the Behringer ECM8000. I measured my consumer speakers (Logitech Z533) and the only way I could ensure the microphone was center was by measuring the distance to the speakers and made sure it's equal. So should be pretty much centered! And I pointed it towards the middle of both speakers, from the height of my listening position (maybe slightly higher). I also sat where I usually sit when producing music during the sweeps.

I also applied smoothing 1/12 as suggested, although I am not sure if that's good because I tried for fun to measure my right speaker once with a blanket covering the wooden-door with a glass front to my right side, and without smoothing, it's clearly visible that this helped with reducing nulling in the higher frequencies: (red is without, green is with the blanket)

With 1/12 smoothing this isn't visible:

Anyways.. here are all the results:

L Speaker SPL + Phase:

R Speaker SPL + Phase:

R + L Speaker SPL + Phase:

L Speaker Waterfall:

R Speaker Waterfall:

L + R Waterfall:

And here's also L + R Waterfall with time extended to 1000ms:

I'll also add the text files, I simply exported the measurements as texts without touching any of the default settings.

Soooo... what does that tell about my room? I think the SPL graphs don't look so bad!

I have a bunch of cartons behind me at the end of the room that aren't there usually, hope that wouldn't improve the room up to a point where the results don't speak for my usual "setting". I don't have enough space to move them away.

 

[Keith_W]

MDAT please, not TXT files. We need the impulse response, not the frequency response.

Have you read the REW eBook, specifically all the sections about room acoustics? RT60, spectrogram, and waterfall?

 

[Darkdays]

MDAT please, not TXT files. We need the impulse response, not the frequency response.

Have you read the REW eBook, specifically all the sections about room acoustics? RT60, spectrogram, and waterfall?

Ah.. I don't have access to that session anymore and didn't save it, I would have to make new recordings tomorrow then..
Yes, I've read your tutorial, although I only understood half of it.

Is there something that you spotted in my graphs that looks like I messed something up?

I just cranked the volume of the speakers up until the 'check levels' in REW said that the signal is okay. The microphone alone (yes, with phantom power enabled) at max input volume always gave me too quiet as result, so the sweep was louder than my common listening volume. Or what are you referring to?

 

[Keith_W]

You messed up by asking for a room analysis and only supplying the frequency response. For a room analysis, we need the impulse response. If you don't believe me, open those TXT files yourself and look at the RT60. It's missing.

In short: ALWAYS POST THE MDAT.

 

[AnalogSteph]

Things don't look so bad... on a 100 dB scale. On a 50 dB vertical it's a lot less pretty.
I guess this is a fairly small room, the lowest mode is at 80 Hz and the highest above 200.
The low-midrange dip might be a result of the sub unit being placed under the desk, relatively far away from the satellites.
Overall balance seems alright, maybe a bit midbass-heavy. Frequency response is decidedly bathtub-shaped overall, which is relatively common for PC speaker systems - EQ is advised.

Since there are no MDAT files for the present measurements anyway, I would suggest studying the MMM (moving microphone method) tutorial for the next round. It's a bit cumbersome when you only have a 0° mic cal file (having to hold the mic horizontally is not helping cable noise pickup) but doable. That should be a decent basis for EQ then.

 

[kyuu]

Separate from the other issues, that 1/12 smoothed graph is actually more useful than the unsmoothed graph. All that grass in the upper frequencies is just obscuring the information we actually care about. You don't hear any of that.