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Table Of Contents
578 EFFECTS MENU
OPTICAL COMPRESSOR
Threshold: This controller defines the threshold at which compression occurs. From a
technical standpoint, you control (in contrast to the fader) the signal strength which is used
to activate the virtual light source with this. The exact trigger point of the threshold is
dependent upon the selected compression reference point and internal parameters. For
exact control of this threshold the VU meters can be set to "reduction".
Output: This parameter is intended for gain increase at high level reduction. We generally
recommend that you set the output so that the resulting level matches that of the disabled
compressor level.
Slope: One could call this parameter the "ratio" and thereby draw an analogy to a common
compressor. This is not, however, completely correct. Here the compression reference
point is influenced in such a way that the result is a softer reference point for lower values
and higher values lead to limiting or even to over-compression. Set at maximum, the
reference point of lower threshold/higher input level even goes a little lower, instead of
remaining at a limiter plateau. This is one of am-munition's specialties and is well suited for
expressive compression of percussion subgroups, e.g. when room features is supposed to
stand out somewhat.
The slope fader does not change the reference point itself, but rather indirectly the way that
transients are treated. Set to the minimum position, the compressors will operate in
"feedback" mode, meaning that the input of the detector switch will be fed from the
compressor output. This controller works fairly softly and transparently and gauges the
signal gently since existing deflections from the envelope are also included. The resulting
reference line is therefore always quite mild.
The more the slope fader is moved to the right, more and more portions of the signal will
be drawn into the compressor input. In this way, the controller combines "feed-forward"
and "feed-back". The leads to a higher weighting of the transients and enables an
aggressive reference line.
We generally recommend a slope setting in the lower third of the fader for a less
conspicuously transparent compression.
Response: The switching principle employed here allows musically sensible control times
via selection of the "light source" and "photo resistance" system components. The
combination of these components determines the shortest possible tune-in and tune-out