The same math works in converting M-S to L-R and back again
The simplified M-S to L-R math is
M + S =3D L
M - S =3D R
(not including all factors for gain. Y'all know you can tweak the
stereo separation by adjusting the amount of side in the equation)
By rearrangement and some grade-11 algebra, you can arrive at
M =3D L + R
S =3D L - R
(S in this context is synonymous with "difference")
I built a op-amp "double matrix" a few years back which took in L and
R, produced M and S which was then available via insert jacks for
alteration, then gets matrixed back to L and R at the output. This
thing was great for enhancing any stereo signal, not just M-S.
Anyway, to solve your problem, the first thing I would try is to just
invert one of the channels to see if the stereo image gets better.
Failing that, you can try matrixing/dematrixing in different ways.
If you have one, a oscilloscope in X-Y mode is great for resolving
phase/separation problems.
--- In "thxdave" <> wrote:
>
> Following on the heels of Bernie's problems, I have something
> slightly(?) easier to work on. I made a trip up to the Savannah NWR
> (with Walt's help....thanks Walt!) and made a couple recorded
> sequences where I swapped my M and S mic leads into my MP2.
> Normally, this wouldn't be a problem as I only run a headphone
> matrix to hear my stereo spread. However, this time I matrixed the
> Tape Out signal as well so my mid and sides got matrixed backwards.
> Is there any easy way to undo this backwards signal and return it to
> two separate mono tracks?
________________________________________________________________________
________________________________________________________________________
"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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