Anyone else use pink noise to position mics?

[Double-Impact]

Why pink noise and not white noise ?

Pink noise has equel energy in every frequenty, White noise has not.
Tjis way you hear a beter frequency spectrum.

 

[LeSedna]

Ok I got the analogy with visible domain frequencies and definitions of colours, but didn't know pink noise had this particularity. Would have Thought equal level = equal energy, but now my maths and physics remind me it's not true at all.

 

[mickrich]

OK
Here is a recording of sweeping the cone using pink noise (recto head and cab,API A2D pre)
First you hear me finding the brightest part of the cone (0:40) with an i5 then moving slightly left/right to show the harshness (1:23) and what I am looking for.
I leave the mic just past the point of high frequency hiss.
Next I do the same thing with a 421 (146) then check phase by bringing the i5 back up in volume and reversing phase on it (3:05) then putting phase back positive (3:25).
http://dl.dropbox.com/u/2133088/MIC POS.mp3

This was all done with the amp very low so I could keep the headphones low and hear the subtle changes as the mic was swept. Mics are about 2" away from grille cloth.

Here are guitars reamped after the mics are positioned. Quad tracked with recto/6505 each side. Equal mix of the 2 mics, multiband comp 200-500 lowpass 10k, hipass 110.
http://dl.dropbox.com/u/2133088/KAAC NEW.mp3

Ended up switching the i5 for a 57 for this album.
Here is 57/421 mix positioned as above.
http://dl.dropbox.com/u/2133088/KAAC Mic test.mp3

 

[::XeS::]

Very good sound. At the end of the story, which were the mic positions? Do you miced the same speaker?

 

[mickrich]

Very good sound. At the end of the story, which were the mic positions? Do you miced the same speaker?

Just outside the edge of the dustcap.
Pretty much where everyone says you should put the mic but this method takes the guesswork out of it and once you get the hang of it, it is pretty easy to find the same position again and get 2 mics in phase.
I usually use 57/421 but decided to try i5/421 this time.
I always mic 2 different speakers. Tends to get a bigger sound for me. The 2 bottom ones on the recto cab in this case.
2 mics on a single speaker (fredman) sounds much flatter than 2 different speakers to me.
I remember reading that's what CR did on Heartwork (my all time fav guitar sound).

 

[Riku]

Pink noise is equal energy in octave bands, white noise is equal energy per frequency.

I align a lot of film studios and cinemas and we use pink noise for lining up the monitoring. White noise is pretty much useless for lining up anything.

http://en.wikipedia.org/wiki/Pink_noise

 

[Let it burn...]

I tried this once but I got way too much treble lolz so I changed back to where I thought it sounded good.

 

[mickrich]

I tried this once but I got way too much treble lolz so I changed back to where I thought it sounded good.

I find that since I started using this technique I have the treble much lower than I used to.
On a recto it's at 11.30oc . On a 6505 it's at 4. I am getting much better clarity with less 200-500 mush.
I remember reading Sneap's recto settings and thinking they were very dull but they work perfect with mics positioned the way I do it now.
http://www.ultimatemetal.com/forum/2694012-post8.html