You're welcome, it is a really useful paper for anyone exploring MS.
On Oct 21, 2012, at 12:02 AM, "ajustend" <> wrote:
>
>
> Michael,
>
> Thank you for sending me this paper, it DID help out quite a bit in my re=
search and continued understanding of MS stereo technique. I referenced it =
and the Manfred Hibbing "XY & MS Stereo Recording Techniques" in my other p=
ost on the thread.
>
> Thanks a bunch! Very good read.
>
> -Justin
>
> --- In Michael Raphael <> w=
rote:
> >
> > This paper from Ron Stryker and Wes Dooley is worth a read:
> >
> > http://www.ribbonmics.com/pdf/technique.pdf
> >
> > If you are new to MS it should explain tons.
> >
> > Best,
> > Michael
> >
> >
> > On Oct 15, 2012, at 8:08 PM, ajustend <> wrote:
> >
> > >
> > >
> > > It definitely seems that the out of phase rear lobe of the MKH50 is w=
hat is causing my problem. The polar pattern of a standard cardioid seems t=
o be much more ideal for what I am trying to accomplish, and since I am new=
to MS recording I failed to realize how the rear lobe of the super-cardioi=
d would end up translating.
> > >
> > > I figured that the rear lobe of the MKH50 Mid mic would only create a=
volume bump in the sounds recorded directly behind (6 o'clock position) th=
e Mid microphone. I did not consider the fact that when decoded the result =
would be the same as a pair of super-cardioids in a coincident XY with both=
of their rear lobes pointing across each other diagonally at the 4-5 o'clo=
ck & 7-8 o'clock positions. :)
> > >
> > > Thank you for the feedback.
> > >
> > > -Justin Mullens
> > >
> > > --- In "Avocet" <brini@> wrote:
> > > >
> > > > > Here is the test I conducted: Set the microphones up in the middl=
e
> > > > > of an open field so that I can walk in a full circle around it.
> > > >
> > > > Justin,
> > > >
> > > > An excellent stereo test.
> > > >
> > > > > Here's the problem, when I get to the 4 & 5 o'clock postions (rea=
r
> > > > > right side) the sound source swap sides and sounds like it is com=
ing
> > > > > from front left. And the exact opposite happens to the 7 & 8 o'cl=
ock
> > > > > positions sounding like they are coming from the front right.
> > > >
> > > > That is what you would expect. M-S gives a good stereo image of a
> > > > forward object, but at angles where M<S, the image tends to wander,=
> > > > then swap over. What you hear depends on your listening system.
> > > >
> > > > The best explantion for what is happening, especiually with an MKH-=
50
> > > > / MKH-30 pair, is to look at the polar response diagrams side by si=
de.
> > > > As you look left and right, the M signal decreaes and the S signal
> > > > increases. When they become equal (for a particular frequency) thes=
e
> > > > are the full left and full right image positions.
> > > >
> > > > Beyond this "sweet image" the decoded M-S goes out of phase, and th=
e
> > > > image placement is not defined. I usually hear this as a behind ima=
ge,
> > > > but it may be just defocussed.
> > > >
> > > > The MKH-50 supercardoid gives a narrower front "sweet object" angle=
,
> > > > but a larger out of phase rear object coverage. Now the MKH-50 has =
a
> > > > rear lobe which is out of phase with the front lobe, so this swaps
> > > > left and right when matrixed to L-R. As with the front image, an
> > > > in-phase but reversed rear image can he heard as long as M>S.
> > > >
> > > > Increasing or decreasing the S signal moves the extreme L and extre=
me
> > > > R object angles.
> > > >
> > > > Does this correspond with your walk around test?
> > > >
> > > > David
> > > >
> > > > David Brinicombe
> > > > North Devon, UK
> > > > Cogito cogito ergo cogito sum - Ambrose Bierce
> > > >
> > >
> > >
> >
> >
> >
> >
>
>
|