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EXTERNAL MATRIXES
When using an external stereo matrix, such as a matrix trans-
former or active matrix circuitry, set the VP88 to MS mode (refer to
the Output Mode paragraph). The Mid and Side outputs can be
processed through a sum-and-difference matrix to produce Left
and Right stereo signals as follows:
Left = Mid + Side
Right = Mid - Side
A 1:1 ratio of Mid to Side produces stereo signals identical to
those obtained with Stereo Output switch set to High (H). Results
similar to the Medium (M) and Low (L) settings can be obtained by
attenuating the side signal before matrixing.
NOTE: An external matrix can be useful when recording, be-
cause decisions on stereo imaging are deferred to the
post-production stage.
Two suggested matrix boxes:
• Model MS38 DM Dual-Mode Line-Level MS Matrix
• Model MS380 TX Stereo Microphone Preamplifier with
Dual-Mode MS Matrix and Line Driver.
Both are manufactured by Audio Engineering Associ-
ates, 1029 N. Allen Ave., Pasadena, CA 91104 U.S.A.
FREQUENCY RESPONSE AND
POLAR PATTERNS
TYPICAL FREQUENCY RESPONSE OF
MIDDLE CARTRIDGE
TYPICAL FREQUENCY RESPONSE OF SIDE CARTRIDGE
FIGURE 8
FIGURE 9
TYPICAL MIDDLE CARTRIDGE POLAR PATTERN
TYPICAL SIDE CARTRIDGE POLAR PATTERN
CABLE CONNECTIONS
4
FIGURE 10
FIGURE 11
FIGURE 12
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