Manual

78 PRO X User Manual
Chapter 11: Panning
The PRO Series Control Centre has two main types of panning mode, default and
surround. The default mode comprises stereo and LCR panning formats, and only
uses the channels for the front loudspeakers, while the surround mode includes
channels for the rear surround loudspeakers.
The following table shows the panning formats available on the PRO X.
Table 7: Panning formats
Panning
mode
No. of
channels Format Channel type
Default 2 Stereo L, R
3 LCR (SIS™) L, C, R
Surround 4 Quad L, R, Lr, Rr
4 LCRS L, C, R, S
5 LCRS LCRS L, C, R, Ls, Rs
6 5.1 L, C, R, Ls, Rs, LFE
Key: L = left; R = right; C = centre; Lr = left rear; Rr = right rear; Ls = left surround;
Rs = right surround; S = surround; LFE = low frequency eects (usually handled by a subwoofer)
Stereo panning
The control surface controls for stereo panning are located in the masters
section of each input fast strip and each channel strip.
The pan control associated with the masters section may be switched for either
conventional or spatial imaging system (SIS™) stereo operation by using the ST or
SIS switches, respectively.
SIS™ (LCR) mode
The MIDAS SIS™, which is used for left-centre-right (LCR) loudspeaker systems,
congures 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.
SIS image control knob centred (equal power)
With both the SIS image and pan control knobs centred, the signal is routed to
all three speakers with equal power.