Aphex Studio Dominator 700 - 7 Factory Options; Model 702 - with Matrix;De-Matrix

7.0 FACTORY OPTIONS
Several options are available to configure the Studio
Dominator for special applications. To insure proper operation
of the limiter, these options are offered factory-installed
only. Separate model numbers are assigned to the different
option versions to avoid confusion. Studio Dominators already
sold can later be changed to another version. Consult Aphex
Systems for further information.
Some audio transmission and recording media require an
audio bandwidth limiting means to prevent cross-channel splash
or aliasing distortions from occuring. Such systems typically
use time or frequency multiplexing to convey two or more Rudio
channels over a single carrier . FM stereo broadcasting,
satellite up1inking, and digital recording are a few good
examples of systems requiring audio band limiting.
Generally, both recording and transmission media also
incorporate some form of audio pre-emphasis which is mainly used
to improve signal to noise ratio. FM broadcasting and many
satellite uplinks, for example, use 75 microsecond high
frequency pre-emphasis . Digital recorders usually employ
pre-emphasis ahead of the AID converter.
In virtually all of these kinds of audio transmission or
recording media, it is important to fully use the availahle
dynamic range of the channel in order to maximize the signal-to-
noise ratio and minimize small-signal distortions. It is also
desirable to utilize the maximum possible audio bandwidth within
the physical constraints of the channel to obtain the maximum
audio fidelity. Meeting these two objectives requires the use
of specialized audio processing technology including
pre-emphasis recognition and lowpass filtering.
Another kind of limiting is required for AM Stereo and
other "matrixed" two-channel audio systems where processing the
sum and difference signals through separate channels is
required.
7.1 Model 702 - With Matrix / De-matrin network
This card converts the discrete left and right channel
input audio to sum and difference information whic}! is then sent
to the two limiter channels. After limiting, selectable
de-matrixing is avai}able to output either discrete left and
right audio or peak limited L+R anC L-R audio.
The results from matrixed processing are not ~otally
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