L-Acoustics V-DOSC, Operator'S Manual

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 89 of 158
Optimizing coverage and intelligibility
Optimizing stereo imaging
Figure 64: Tradeoffs between intelligibility versus stereo imaging
3.2.2 LEFT/CENTRE/RIGHT (LCR) CONFIGURATIONS
Although it can be sometimes difficult to negotiate the centre position (from a visual standpoint), LCR
systems offer more flexibility in optimizing audience coverage with the potential for improved
intelligibility, more even horizontal tonal balance and better image localization compared with
standard LR configurations. For more details, the interested reader is referred to “Mixing Left-Centre-
Right, Managing Shed Sound – the evolution of PA Methodology Solutions, including LCR” by Robert
Scovill (Live Sound International, Nov/Dec 2002).
When using the LCR configuration for live music applications, three V-DOSC arrays can be installed
with the C array at 0 degrees and the L/R arrays panned offstage up to 20 degrees (for speech
reinforcement, L/R arrays can be panned offstage up to 70 degrees to optimize coverage and
intelligibility). For theatrical sound reinforcement, the 120 degree coverage of dV-DOSC is well-suited
to centre cluster applications since there is a good match between C system coverage and overall L/R
coverage for the typical 12-15 metre L/R array separation that occurs in theatres.
Note: As Scovill points out, mixing console choice is a key element for making the LCR configuration work,
i.e., the console must be capable of generating an LCR mix suitable for live music sound reinforcement.
(Console requirements for theatrical sound reinforcement are different since the centre cluster is typically
used for speech reinforcement and the L/R arrays for music)
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LCR System (3 x V-DOSC arrays) for outdoor
amphitheature (shed) sound reinforcement (after Scovill)
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LCR System (C= dV-DOSC, LR= V-DOSC arrays) for
theatrical sound reinforcement
Figure 65: LCR Configurations