ir analysis

[artek]

I've made measurement with aliki of my room / audio equipment.
I can use Sonic Visualiser but I can't interpret it.
What is it all about? is it good or is it whack?

I was unable to add atachment,
here is link to ir on wetranswear
we.tl/jwuBLo7SRM

[ssj71]

artek:

I can't see your image for whatever reason (maybe just the firewall at work) but the basics of IR analysis are that you are measuring how the room responds to an impulse. I know thats obvious, but an impulse is a wide band signal, where all frequencies are contained in it, so you are looking to see how the room responds to every frequency. What you want depends on the purpose of the room. A live room will naturally have a longer decay time on many frequencies than a vocal booth. A mix room you probably want a relatively flat frequency response with quick decay times. Unfortunately though your measurement is subject to the resonances and frequency responses of the mic you record with and the speakers you produced the input signal (sine sweep with aliki) from. If this is a recording room the "perfect" response is exactly an impulse out, meaning the mic and speakers and room reproduce exactly what you are trying to record. Such a room doesn't exist, but its the ideal. Perhaps more perfect though is a perfectly neutral room that reflects most generally all the listening spaces you intend to be heard in.

What you probably see are several stronger frequencies in the response from room modes or innumerable other factors, and some resonances where certain frequencies don't decay very quickly. From a mix standpoint you really don't want resonance, these long decaying frequencies get emphasized in your room/system but other people will hear totally different frequencies. Especially in the bottom end if there is a lot of resonance everything gets boomy and muddy. You might end up cutting it a ton then when your tune is heard in another environment it has no low end! Any frequency that sticks way out or decays very slowly you will want to consider getting extra room treatment for or at least be aware of so you don't mix specifically to your system. Again I'm not sure the exact purpose of your room (record, mix, master?) but hopefully this helps.

Everyone feel free to correct me. The math stuff is easy for me but the music side I'm still learning.

[Capoeira]

can't see it either

I suggest using qloud: http://gaydenko.com/qloud/

AND export the FR to REW: http://www.hometheatershack.com/roomeq/

to have a waterfall plot. waterfall plots show you a lot more.

than show your meassurements here, because it's easier to explain having an example

[Capoeira]

or just use REW ( a lot eaSIER). it should work with alsa (not jack though)