SOLID STATE LOGIC XLogic G Series Stereo Compressor [11/18] Operation
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SOLID STATE LOGIC XLogic G Series Stereo Compressor [11/18] Operation

SOLID STATE LOGIC XLogic G Series Stereo Compressor [11/18] Operation
Page 7
4.0 Operation
The XLogic Stereo Compressor unit is a 1U rack-mounting stereo compressor designed to provide flexible control
over a stereo mix. The compressor design is based around that found in the XL 9000 console Centre Section.
4.1 Compressor Controls
The compressor sidechain controls are straight forward and hopefully require little explanation. The
ATTACK, RATIO and RELEASE controls are multi-position switches; the THRESHOLD and MAKE-UP
controls are continuously variable potentiometers.
It should be noted that the knee point of the compressor, set with the THRESHOLD control, purposely
changes depending on the setting of the RATIO control. Decreasing the RATIO setting lowers the effective
threshold, hence maintaining the perceived ‘loudness’ of the compressed signal.
The illuminated compression meter to the left of the unit displays gain reduction for the compressor. If
required, a secondary (non-illuminated) meter can be connected via the REMOTE connector on the rear of
the unit – see Appendix B for connector details.
4.2 External Side Chain
The compressor side chain can be driven either by the main stereo channel signal(s)
whereby the loudest signal wins and provides the side chain signal, or by an external
(mono) signal applied to the KEY INPUT on the rear of the unit. This feature is enabled
by the EXTERNAL SIDE-CHAIN switch on the front panel and opens up the possibility
to use the unit as a ‘ducker’ (for audio-follow applications) or, with external EQ, as a ‘de-
esser’.
4.3 Autofade
The final part of the compressor is the AUTOFADE switch and associated
rotary control which provides a timed fade down or up with a fade time of 1 to
60 seconds. Pressing the switch will fade out the audio in the time set on the
associated control and releasing the switch will fade the audio back up in the
same time – the fade time can be adjusted at any time. The AUTOFADE switch
will be illuminated whilst the signal is fading down and will remain
illuminated until the signal has returned to normal gain.
This function can also be actioned remotely via a switch and associated 24V tally lamp connected via the
REMOTE socket on the rear of the unit – see Appendix B for connector details.
RATE - S
10
20
40
60
1
3
6
AUTO
FADE
EXTERNAL
SIDE - CHAIN
IN
RATIO
4
10
2
THRESHOLD
0
+15
-15
RELEASE - S
.6
1.2
Auto
.1
.3
MAKE-UP
5
10
+15
-5
0
ATTACK - mS
1
10
30
3
.1
.3
COMPRESSOR
A
A
20
0
4
8
12
16
dB
COMPRESSION
IN
Installation and Operation

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