L-Acoustics V-DOSC, Operator'S Manual

Page: 87 / 158

L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 87 of 158
Flying Guidelines
The rigging system is rated for a maximum of 16 V-DOSC or 15 V-DOSC + 3 dV-DOSC
Particular attention must be paid to the height at which the array is flown when predicting the vertical
coverage in ARRAY 2004 or SOUNDVISION. Typically, system trim height should be selected to
provide a 4:1 ratio between the throw distances to the furthest and closest members of the audience
and, as a rough guideline, the elevation of a 12 enclosure arena system is typically between 11-15 m
(36-50 ft), depending on the exact geometry of the audience. When simulating system coverage using
ARRAY 2004 or SOUNDVISION, the goal is to select inter-enclosure angles so that equal spacing is
obtained between enclosure site angle impacts over the audience geometry (WST Condition 4).
Note: inter-enclosure angles should not be selected by considering the on-axis cutview only – always
consider the audience coverage off the main axis, especially from 35° to 45° on the offstage side. It is
important to check that you are not lacking in offstage coverage and require additional fill systems (see
Multiple Arrays). It is also common to have two sections of the audience area that have different
slopes, for example, the transition between floor level and the tribune in arenas. In this case, coverage
of the areas at the transition between the two slopes should be examined carefully and angles selected
accordingly.
Finally, to effectively complete any V-DOSC installation - stacked or flown - during the actual
installation, it is important to verify that the parameters calculated in ARRAY 2004 or SOUNDVISION
have been implemented correctly. Tools that are useful for this purpose are described in Chapter 6.4.
Detailed flying and system focussing procedures are described in Section 4.2.
Figure 62: Illustration of flying guidelines
Figure 63: Flown V-DOSC System (Coldplay World Tour 2001-2002- sound design T Smith)