At 3:39 PM +0100 7/1/08, Andrew Carter wrote:
>
><http://www.standlynch.co.uk/sound%20bites/First%20Gully>http://www.standl=
ynch.co.uk/sound%20bites/First%20Gully
>Fulmars.mp3
>
>In the second recording you can hear a faint buzz on the right chanel,
>which occurs every 8 or 9 seconds - the first really noticable one is at
>30 secs - esp. in spectral view. I've tried to replicate it back home
>with no success - any suggestions as to what is causing it - and no I
>didnt have a mobile phone with me.
Hi Andrew--
I'm happy to learn that you are enjoying your NT2000 experiments.
In addition to the short "buzzes," you describe (here's a sonogram
with a Hz stepped buzz quite visible in the middle
http://ad2004.hku.nl/naturesound/RobD/First_Gully_Fulmars_R_Ch_ZipperNoise.=
jpg
or http://tinyurl.com/4bbmwz ) I detect that the right channel audio
signal has more noise and some break-up.
You'll need to see if you can reproduce the problems. Try leaving the
rig out 24/7 under cover in the most humid/hot location you can
find/create turned on all the time. You can also use a progressively
hot shower but I'd try natural conditions first.
Once the problem sets-in, record some of it and then swap the mic
cables left and right. If the noise moves to the other channel, its a
bad mic. Record/document some of that.
Your dealer should gladly replace any bad mic including the NT2000--
especially if they know you have documented the problem and only one
mic is acting-up. Don't be bashful about requesting a replacement.
I've only been able to test four NT2000's, but there are indications
that more recent (higher) serial numbers seem to perform better than
earlier ones. Check your serial numbers and send both the me
indicating which is having the trouble.
5" boundaries are not problem.
As we have discussed before, some folks like more separation between
the left and right channels because they play their recordings on
speakers and this gives the stereo image more contrast which they
find appealing. I prefer a little more "center" mix than your current
mic positioning is creating.
If you want to, try moving both of the capsules closer to the front
edge of the boundaries-- in the range of .5" to 1.5". If you want to
be more certain of your preference, make a test recording of mostly
distant "air" or ambience before and after you make the change.
Place distant surf or highway in the center of the stereo field by
ear. (Its easier to evaluate Left <-> Right balance with sounds from
a distance than close sounds). Place these files back to back in a
loop to evaluate the difference. You should be able to find a
set-back distance where the horizontal field is quite even from far
left to far right.
A little greater "mix" of the left and right sides in the center can
improve the sense of spatial depth. I think you'll be amazed over
time how much spatial reach these mics have. Its a neat aspect of
Curts' design that the "set-back" an easy adjustment to make if you
drill a series of holes in the boundaries. Let us know how thing
progress. Rob D.
>
>Thanks to Rob for highlighting the possibilites of these mics - yes they
>really are good in windy conditions - yes they are heavy but I carried
>them in a case with the rig quite happily for 3/4 of a mile with tripod
>- and to him and Curt for the rig.
>
>Andrew
>
--
|