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Stereo Mastering Dynamics Processor U796M2 - 3-Slot / Triple-Wide Version
V700 Mastering Modules
Stereo Mastering Prozessor Home
The Stereo Mastering Dynamics Processor is available in different versions, which have different control ranges and configurations of particular functions. In
addition, the color of the faceplate and the control knobs can be determined by the customer. Therefore, the appearacne can be different from the the graphics
below. The feature set is identical with all these versions. The modules are available in balanced, grounded (eletronically balanced), and balanced, floating
(transformer balanced) versions. Both versions can be selected for inputs and outputs independently.
The U796 Mastering Dynamics Processor is available in 3 versions, U796M1, U796M2 and the 3-slot version of the U796M2. This page refers to the standard, 2
slot versions U796M2. The 3-slot version is almost identical; however, some additional functions are exisiting. The
For a general desciption of the module, please change over to the
Initial Settings
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Control Elements
1
Limiter Threshold
sets the threshold of the limiter section between - 6 and
+ 18 dB
2
Limiter Release
modifies the limiter release time from 50 ms to 2.5 sec
3
Limiter Attack
Attack time variation from 20 µsec to 6 ms. With the
minimum attack time the second half wave of a 20 kHz
signal is regulated down to threshold. The longer
settings are only important when using the limiter as
additional compressor section.
4
Limiter Ratio
If an external limiter, like the
Delay U795
be used as additional, independent compressor stage.
The ratio control is only meaningful, if the limiter is used
as compressor.
5
Output Gain
The output gain control only affects the output level but
not the limiter and/or compressor settings. It has a
control range of +/- 10 dB. Output gain is usually
switched on and off together with the limiter.
5a
The GAIN Switch activates the Output Gain Control,
independent of the Limiter. If GAIN is not pressed, it will
be activated if the Limiter is switched on (6)
6
The LIM Switch activates the Limiter
7
Compressor Threshold Control
Controls the threshold level of the compressor section in
the range from -32 dBr to + 15 dBr (0 dBr = + 6 dBu ~ +
4 dBV)
8
Crest Switch
The Crest Switch changes the operation mode of the
ac/dc converter from peak (PK) to RMS in 6 steps. Peak
causes a fast and hard regulation with high density,
while RMS results in a soft, loudness related regulation.
The other positions select carefully choosen values
between the two extremes.
9
Knee Control
changes the transition from the unregulated range below
threshold to the regulated range above threshold from
hard (0 dB) to soft (20 dB). With the 20 dB setting the
law that is determined by the ratio setting is reached 20
EMAIL
2-slot version is
Mastering Peak Limiter with
is used, the limiter section of the U796 can
here. The
U796M is
here.
Notes and
Pecularities
The Limiter
is an
independent
section. The
limiter input
is driven
from the
compressor
output. It is
located
directly pre
the output
drivers of
the dynamics
processor.
With Limiter
Operation
the Ratio
contol has
to be set all
to the right!
The position
of the Crest
switch
determines
the basic
character of
the
compressor.
The lower
the ratio
setting is,
the lower is
the incluence
of the soft
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Summary of Contents for adt-audio U796M
- Page 1 U796M2. The 3-slot version is almost identical; however, some additional functions are exisiting. The 2-slot version is here. The U796M is here. For a general desciption of the module, please change over to the Stereo Mastering Prozessor Homepage...
- Page 2 dB above threshold. During this level range there is a knee control successive approximation to the ratio setting. Envelope A special low filter combined with a modulation of the release time makes possible to achieve a better bass compression with low distortion using short, pump free release time settings.
- Page 3 Equalizer, possible to include an external eq that alters the W799 frequency response under regulation. Expander and available Limiter are not affected. AUTOGAIN OFF switches the autogain function off Regulation Reverse the compressor defaults to feedforward regulation. The REG REV switch selects feedback regulation instead. With feedback regulation the basic character of the compression is changed.
- Page 4 The function is similar to adds long time integration modulation to the regulation the 'Auto' of the compressor. This control can loosen a tight and setting of the hard compression and regain some natural sound release time performance; however, it can also result in lower in some loudness when not used carefully.
-
Page 5: Initial Settings
Initial Settings 1. Use the ON Switch (29) to insert the module. Limiter: 2. Set the Limiter Threshold control (1) all to the right 3. Set the Limiter Release control (2) to 0.3 sec. 4. Set the Limiter Attack control (3) all to the left 5. - Page 6 25. Switch on the Compressor (15) Expander/DeCompressor/Pump-Up Compressor: 25. Set the Threshold control (23) to - 15 dB 26. Set the Release control (24) to 0.3 sec 27. Set the Attack control (25) to 6 ms 28. Set the GR-Limit control (27) to 10 dB 29.
- Page 7 enough to avoid audible pump up, but as close as possible to the point where pumping becomes audible. If the acutal setting causes no pumping, increase the release time a little (to .6 or .8 sec). If there is still no pumping add gain reduction by turning the Threshold control (7) one or more clicks to the left.
- Page 8 Options: At this point you can try some more functions that might improve the result: k) Knee (9) Open the knee control and try if a soft knee setting is of advantage. The effect of a soft knee setting is high with high ratio settings, but lower with lower ration values, so don't expect a miracle.
- Page 9 the level drops below threshold. The regulation takes place only below threshold. Actually there is no lower limit but a GR-Limit control (27) that avoids that the pump up compressor raises the noise level too much. We have already prepared the section with the initial setting. o) Switch on the section with the EXP switch (28) p) Check for the gain reduction and readjust the threshold control (23) to get 6 to 9 dB of gain change on the display.
- Page 10 y) set the GR-Limit control (28) to 10 dB for the beginning z) reduce the Threshold level (23) until you get the impression that you've found the upper point of the over-compressed signal. I) readjust the GR-Limit control (28) to determine original threshold level of the comrpession.
- Page 11 release time setting (2) for pumping effects again. Alter the Attack control and try to find a setting that causes an improvement. The sound will change in the range from approx. 1 ms to 6 ms, due to the different regulation of the transients. Use the Output Gain control (5) to set an output level that meets your needs.