Martyn,
I just tried uploading an mp3 of my recording (1.6 MB) but was unable to ad=
d it to the Files section of this message board. As I said, I am brand new =
here, can you point in my the right direction for where I can share my reco=
rding so you can take a listen?
Thanks,
Justin
--- In Martyn Stewart <> wrote:
>
> Is there a chance you could post an example, Justin? I would like to take=
a listen to your ordeal...
>
> Martyn......
>
>
> On Oct 15, 2012, at 10:59 AM, "J. Mullens" <> wrote:
>
> > Hi, this is my first post to Nature Recordists.
> >
> > I have just added an MKH 30 to my collection in order to expand into MS
> > recording and am experiencing very bad imaging (side swapping) with the
> > setup when the sound source is located in certain places behind the
> > microphone.
> >
> > To clarify, I am *not *trying to record a surround signal using a stere=
o
> > mic setup, but I *am *interested in maintaining a correct left-right st=
ereo
> > image. When I use an XY setup, or an XY mic like a BP4025, anything on =
the
> > left side of the mic (in front of it or behind) will playback out of th=
e
> > left speaker. Using the MKH30/50 combo this is not the case.
> >
> > Here is the test I conducted: Set the microphones up in the middle of a=
n
> > open field so that I can walk in a full circle around it. I start direc=
tly
> > in front of the M/S setup, about 15-20 feet away, and walk in a clockwi=
se
> > direction around mic calling out each position on the clock face. 12 is
> > directly in front, 1, is to the right of that, 3 is directly to the rig=
ht,
> > 6 is directly behind, 9 is directly to the left side, etc.
> >
> > Here's the problem, when I get to the 4 & 5 o'clock postions (rear righ=
t
> > side) the sound source swap sides and sounds like it is coming from fro=
nt
> > left. And the exact opposite happens to the 7 & 8 o'clock positions
> > sounding like they are coming from the front right.
> >
> > Again, any source originating in the 180 degree arc in front of the set=
up
> > performs beautifully and the stereo image is perfect. It only happens t=
o
> > sounds coming from behind the mics, and if a sound source is making a
> > constant tone you can actually hear it jump diagonally across from one =
side
> > of the stereo field to the other as it enters these rear right & left a=
reas.
> >
> > After asking around it has come to my attention that the closer your Mi=
d
> > mic is to a pressure-gradient mic (figure 8 polar pattern), the more of=
a
> > rear lobe you have, and thus the more chance you have of that rear lobe
> > picking up sound in the opposite channel. This definitely explains how,=
and
> > why, I could be experiencing side swapping.
> >
> > Since I've never used an MS setup with a pure cardioid mic I am wonderi=
ng
> > if the same thing happens... For those using a Sennheiser 30/40 MS setu=
p:
> > does this happen? Do you have side swapping in the 4-5 o'clock and 7-8
> > o'clock positions?
> >
> > Nature recording is, for me, one of the areas where a really accurate
> > stereo image in a 360 degree circle around my recording location is
> > critical. I am always pointing my mics at the source I am recording, bu=
t
> > having sounds behind the mic appearing in opposite channel is just weir=
d.
> > How do the MS recordists on this forum deal with this?
> >
> > Thanks!
> >
> > -Justin
> >
> >
> >
>
>
>
>
|