98 Chapter 11: Panning
PRO2 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 SIS image control knob set fully clockwise or anti-clockwise, 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.
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 the centre
speaker only; there is no signal in
the left and right speakers.