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balance between the main information of the mid
channel and the spatial contribution of the side
channel. This balancing can even be performed during
re-processing without a loss of information if the
original MS signals were recorded.
The MS signal format is converted into the XY format
(ie: standard left/right stereo) by adding or subtracting
the signals according to the principle X = M + S,
Y = M – S. The proportion of the S signal influences
the spatial effect and should be chosen in each case in
accordance with the recording situation. In order to
avoid restricting the possibilities of designing the
sound
impression,
MS – XY
matrixing
in
the
microphone was not employed.
If a matrix circuit is not available on the mixing
console, matrixing can be performed using the 3-fader
method (see diagram). The M signal is connected to
M
S
-
+
+
R
L
3dB
the first microphone channel and panned centre. The
S signal is connected to the second channel and
panned full left. Take an output from the second
channel and connect to the third channel panned full
right and phase reversed (via a phase reverse switch
or via the cable). (To set the correct S signal level - set
the pan controls of channel two to central, set the main
fader to normal level and set the correct level at the
preset. Then, set the pan control of channel 3 to
centre, set the main fader to the same level as channel
two and then adjust the pre-set of channel three until
MKH 418 S
9
