112 Chapter 11: Panning
PRO6 Live Audio System
Owner’s Manual
SIS™ (LCR) mode
The Midas SIS™, which is used for left-centre-right (LCR) loudspeaker systems,
configures the channel for LCR mixing. The SIS switch activates the spatial imaging
system, which uses the SIS image control knob to modify pan control knob operation
so as to place the channel within a three-speaker system.
With the SIS image control knob set fully clockwise or anti-clockwise the image is full
LCR or stereo, respectively. Control knob positions in between generate a composite
blend of stereo or LCR panning systems, so that optimum degrees of centre image
focus and speaker power can be obtained. This is illustrated in the following
subsections, which shows the masters section in the channel strip.
Constant power is maintained at all times so that the image can be adjusted during the
show without a perceived change in level.
SIS image control knob fully clockwise (LCR)
With the SIS image control knob fully
clockwise the pan control knob operates in
full LCR mode. A centre-panned signal,
that is, with the pan control knob set to
the c position, routes to centre speaker
only; there is no signal in the left and right
speakers.
SIS image control knob fully anti-clockwise (stereo)
With the SIS image control knob fully
anti-clockwise, the pan control knob
operates as stereo. A centre-panned
signal routes to the left and right speakers
at equal power.
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