Channel Compressor; Channel Insert - Solid State Logic SiX User Manual

Channel Compressor

The channel compressor on SiX is a new design, inspired by the sophisticated channel
dynamics sections of earlier SSL analogue consoles, but with some clever design features
to give powerful and versatile performance from its deceptively simple appearance.
The attack time of the compressor is program dependant and varies between approximately
8 ms and 30 ms. This allows the compressor to operate smoothly when working with a wide
variety of content. The release time is approximately 300 ms and the ratio is a gentle 2:1.
The single user control is for the compressor Threshold adjustable between +10 and -20
dBu and is accompanied with three LEDs indicating the amount of gain reduction being
applied. The circuit has automatic make-up gain to maintain signal level for the full range
of threshold settings.
As with the EQ circuit, the compressor can be completely bypassed using the IN switch,
providing a simple way to compare the compressed and uncompressed signals. This also prevents component tolerances from
influencing the sound of the channel strip when the Threshold is turned to minimum.
Channel Processing Overview

Channel Insert

Following the EQ and compressor in the channel signal flow is a fully balanced insert point. In common with larger SSL consoles,
the Insert Send is always active, while the Insert Return switches into the signal path when selected.
The primary use of the insert is to bring external processing into the channel signal path. For example, to insert a more surgical
EQ or fully featured dynamics unit such as those found in SSL's X-Rack or 500 series modules.
SiX User Guide
Another benefit of this configuration and the unity gain design is that the Insert Send can be used
as a pre-fade, post-processing direct channel output to act as a record feed for a DAW. This
leaves the Insert Return free to be used as a pre-fader/pre-pan path input by selecting the Insert
IN switch and feeding a separate line level signal into the Insert Return.
The channel insert sends and returns are found on the rear panel 25 way D-Type connectors.
Wiring details are in the Connectors section, later in the document.
Detailed Description
7