User Manual
SiX User Guide
Detailed Description
13
Foldback and Stereo Cue Master Section (including Talk Input)
The two Stereo Cue buses in SiX feed the Foldback Master section. This section is split vertically
with the left column controlling Foldback 1 and the right controlling Foldback 2.
The knobs in this section control the master level of the individual Foldback outputs. As can be
seen in the block diagram on the next page, they are the last controls before the output (i.e.
after the switched sources).
Three switches intercancel in order of priority from bottom to top are the TALK, EXT 1 and EXT
2, with the following functions:
- TALK - switches the output of the Talk section to the Foldback Output
- EXT 1 - switches the External Source 1 input to the Foldback Output
- EXT 2 - switches the External Source 2 input to the Foldback Output.
Talk Input Pre-amplier and LMC
SiX’s Talk Input is an additional pre-amplier and compressor circuit nominally designed to
provide talkback facilities to the Stereo Cue/Foldback outputs of the console, but with several other possible applications when
the design is explored more fully.
Talk Input
The Talk input is a balanced female XLR connector. Below the connector are switches
for Phantom Power and the LMC. LMC is the legendary SSL Listen Mic Compressor
(here being used for Talkback, which is arguably its original design purpose).
The Talk Input feeds a xed +45dB high quality mic pre-amplier and then optionally
the LMC compressor. The LMC adds an additional +20 dB of make-up gain to restore
signal level after the severe amount of gain reduction it introduces by design. The
output level of the Talk circuit is controlled by the TALK knob.
The LMC circuit is designed to allow a microphone connected to the Talk Input to
maintain similar level signals regardless of whether the source is close or distant. i.e.
if an engineer is close to the console and another person is sat on a couch behind the
engineer, the artist will hear both of their voices legibly and at a similar level.
The TALK key in the Foldback master section latches to allow a secondary use of the
Talk Input pre-amplier and compressor as an effect, using the Foldback send as the output.