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Pink Noise
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Author:  LondonLive [ Fri Jan 04, 2008 9:28 am ]
Post subject:  Pink Noise
I was just wondering if anyone else here ever uses Pink Noise to calibrate a room. If so how many samples do you take and how much do you trust the results. I have encountered one room in particular that is giving me fits.
Author:  Lonman [ Fri Jan 04, 2008 9:42 am ]
Post subject:  Re: Pink Noise
I used it once - got a nice flatline response, & ended up re-eq'ing, basically ringing out the room for feedback.
Author:  LondonLive [ Fri Jan 04, 2008 10:21 am ]
Post subject:  Re: Pink Noise
Lonman @ Fri Jan 04, 2008 12:42 pm wrote:
I used it once - got a nice flatline response, & ended up re-eq'ing, basically ringing out the room for feedback.


So are you saying you weren't happy with what your ears were hearing or did you have to correct for feedback? I know in an ideal situation everything is zero. So am I safe in assuming that all frequencies are suppose to be equal in the room? No peaks, no valleys. I've been doing some experimenting with the pink and am reasonably happy with the results, but its still hard to trust the results, at least for me. I'd like to have a hand held instead of a rack mount so I could sample the room after it fills up and move around with it. I have a driverack with the Auto Calibration in it, it is interesting to watch and hear it do it's thing. The bottom line is I've been trusting my ears for a long time, and old habits are hard to break.
Author:  Lonman [ Fri Jan 04, 2008 10:33 am ]
Post subject:  Re: Pink Noise
Personally I didn't actually like the sound I was hearing.  Also I would get readings in several different areas of the room & get different responses for each (some so different it was a completely different eq setting).  When the mic got back to the stage, where the feedback would likely originate, it was again completely different, but if I left it to where it was technically flat, I would get feedback - so I eq'd it the way I know how & the overall sound was generally better - at least to my ears, maybe not to specs in a technical aspect.
Author:  LondonLive [ Fri Jan 04, 2008 11:07 am ]
Post subject:  Re: Pink Noise
Quote:
if I left it to where it was technically flat, I would get feedback


Now that seems odd doesn't it. I mean in theory it would seem if the room was perfectly balanced that it would be less likely for feedback to occur. I've seldom had trouble with feedback in my frontals, usually a little in the monitors, but that is even rare now that I use a separate board for them. I run a triamp three way  system and am seriously considering going to quad but that would be another discussion wouldn't it. I have this one room, the board is probably about 50 foot away from the frontals against a wall that runs about 20 foot out parallel to the stage. I can get tons of bottom end where the board is located, but if you move just a few feet down the same wall, the kick almost vanishes. Thoughts? By the way I use two front loaded 18's @ about 2k watts.
Author:  Laura [ Fri Jan 04, 2008 1:43 pm ]
Post subject:  Re: Pink Noise
"Iiiiiiiiiii'm...comin' out, so you better get this party started..."

...Oh, wait a minute, you said Pink NOISE.   LOL
Author:  sidewinder [ Fri Jan 04, 2008 2:35 pm ]
Post subject:  Re: Pink Noise
WHO KNEW????
Author:  karyoker [ Fri Jan 04, 2008 3:57 pm ]
Post subject:  Re: Pink Noise
RTA software is fairly cheap and a lot more accurate  now than the old analogue spectrum analyzers or pink noise.  Here is the faq page.

I have never done any acoustics with it (just mixers amps etc) but it wouldnt be that hard.
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