d&b TI 385 d&b Line array design - Manual (Page 30)

Group controls CUT and CPL
Controls for functions that must have the same settings for
all group members (CUT and CPL) are provided as
common controls for the group.
Group controls for Level and Delay
Controls for functions that can be set individually for
different group members (Level and Delay) are provided as
relative controls incrementing/decrementing all respective
values while maintaining relative settings.
The simulation results change in accordance with the
settings.
Cabinet specific controls
Type: Defines each individual cabinet and its HF horn
orientation.
For cabinets that are equipped with rotatable HF horns,
both horn orientations can be selected separately. Each
selectable orientation for a specific loudspeaker type uses
its own measured polar data set. This is defined by the
chosen nominal horizontal and vertical dispersion angles
and follows the convention [SystemName] [horizontal
dispersion] x [vertical dispersion] while the cabinet itself
remains in its typical mechanical orientation, i.e. in an
upright position (e.g. 10S 75x50; E6 55x100; Q7 40x75
etc).
If a system is used lying on its side, the standard dataset
must be used and the cabinet rotation must be set to either
90°(on its left side, seen from a listener's position) or 270°
(on its right side, seen from a listener's position).
Level control: Independent level control to maintain the
individual tuning of the particular loudspeaker.
Delay control: Independent delay control to maintain the
individual tuning of the particular loudspeaker.
HFA: Available for all point source loudspeakers. Rolls off
the HF response of the system providing a natural,
balanced frequency response when a cabinet is placed
close to listeners in near field or delay use.
Cabinet layout, positioning and aiming
You can define the individual position of each cabinet in the
room by entering the desired x, y, and z coordinates. For
point sources, the insertion point is the geometric center of
the cabinet front.
All three values can be modified for the whole group in a
relative way at one go using the + / – buttons.
The coverage and level distribution in the audience areas
are mainly adjusted by entering data in the entry fields for
Vertical and Horizontal aiming. Horizontal aiming: a
positive angle aims towards positive y values. (For pairs of
cabinets it refers to the house left cabinet, i.e. positive value:
rotated inwards, negative value: outwards).
The Rotation field allows you to adapt the cabinet's
deployment to given visual or mounting restrictions relating
to a specific loudspeaker position. The cabinet can be
rotated in steps of 90° degrees.
To calculate SPL over distance, ArrayCalc uses the
projection of the listening planes in the direction of each
source's global aiming.
Export/import of point source settings
You can export defined point source settings including the
cabinet layout to an ArrayCalc description file (*.dbep).
This file including the exported point source settings can
then be imported in other projects or in the same project
again, for example for comparative purposes. To use the
point sources export/import function, right-click in the Point
sources dialog to activate the context menu or select 'Export
source/Import source' from the Sources menu.
Polar profile (vertical profile)
The diagram displays the vertical aiming of the selected
cabinet reflecting the actual aiming into the room. At the top
and bottom, the vertical –6 dB isobar lines are shown as a
guideline.
TI 385 (6.0 EN) d&b Line array design, ArrayCalc V8.x Page 30 of 54