Si Performer Dmx Functionality - SoundCraft Si Performer User Manual

SI PERMER DMX FUNCTIONALITY
The Si PERFORMER DMX control system operates in a similar manner to a 2, 3 or 4 channel
preset lighting console. There are 4 DMX controller fader layers accessed by a press and hold of
the [ALT] key plus A/B/C/D.
NOTE: While on a DMX layer, the fader layer keys are lit orange.
Each layer presents the 22 (Si PERFORMER 2) or 30 (Si PERFORMER 3) DMX controllers hard
patched to DMX addresses 1-22 (Si PERFORMER 2) or 1-30 (Si PERFORMER 3). Each layer has
a dedicated master which acts as an overall level control for the DMX channels.
Si PERFORMER DMX works on an HTP (highest value takes priority/precedence); the 'output'
of any DMX channel/address is the highest of the four layers as shown in the examples below.
DMX channel1 MASTER A@
100%
100%
50%
To understand the maths, a fader at maximum (100%/FL) should be considered to have a value
of 1 whilst a fader at minimum (0%) should be considered to have a value of 0; the fader law
is linear. The resultant output of any DMX channel is DMX channel value * DMX master value so
in the 3rd example the winning result was DMX MASTER B 0.5 (50%) * DMX master 0.5 (50%)
= 0.25 (25%).
NOTE: DMX math differs from audio channels and VCAs where the resulting audio out is
channel level * VCA1 * VCA2 * VCA3 etc... so once one VCA is at minimum (value=0) the
resulting output of the channel is '0' / -inf. dB.
When storing a cue on the console all audio and DMX settings; use the global ISOlate functions
in the SHOW menu to prevent unwanted changes to the audio when playing a lighting cue (and
vice versa).
62
MASTER B@ MASTER C@ MASTER D@
0% 25%
75% 50%
10% 50%
Soundcraft Si Performer User Guide V1.1 1112
Winner is...
50% 100% 'D' @ 100%
30% 25% ' A ' @ 75%
40 30% 'B' @ 25%