HK Audio CAD 208 - Handbuch (Seite 16)

Cadis™ Manual 1.0
1 Acoustic Simulation of CADIS™ Setups
with EASE Focus and the CADIS-GLL
for EASE
An acoustic simulation serves to predict expected audio results. Its ability to
predict how well a proposed sound reinforcement solution will work in practice
makes it very helpful in mastering sound reinforcement challenges. Best of all,
it lets you perfect the sound system before you actually set it up. The simulation
helps detect errors beforehand, sparing you the considerable extra effort it takes
to correct flaws after the system is up. For this reason, acoustic simulations
have become standard practice for fixed installations and a handy tool used in
many projects.
With the arrival of line arrays, acoustic simulations are seeing more frequent
use for mobile sound reinforcement. And for good reason, because achieving a
satisfying audio result with a line array requires very careful configuration and
alignment. To help you determine such a best-case configuration and alignment
of the CADIS™ Line Array before you set up or install it, HK AUDIO offers a
system definition file (CADIS.EFO) for the simulation program EASE Focus and
a generic speaker library file (CADIS.GLL) for EASE version 4.2 and higher.
EASE 4.2 takes into account the given acoustical conditions to calculate all
relevant audio parameters such as direct and overall sound levels, delay times,
clarity, speech intelligibility, and so forth, as well as to create auralizations.
EASE 4.2 is used above all to plan CADIS™ system configurations for fixed in-
stallations and larger mobile sound reinforcement projects.
In contrast, EASE Focus is employed for mobile sound reinforcement appli-
cations that allow little time for complex simulations. It calculates a CADIS™
configuration’s sound dispersion across audience areas in a vertical sectional
view, whereby the room’s acoustical influences are not taken into account. EASE
Focus lets you determine the best configuration and alignment for a sound rein-
forcement application in a virtual simulation; that is, without having to map the
room’s complexities and without setting up, testing, and adjusting the system
until you find the optimum solution.
Note: Bear in mind that precisely measuring a room’s dimensions and geo-
metry (particularly of the audience areas) and carefully planning the CADIS™
configuration will always take less time than determining the best possible con-
figuration by trial and error. Oftentimes, CAD files - or at least scale diagrams
of halls – are available on venues’ websites. These sources can provide all the
information required for prior simulation.
The following applies to every simulation:
Calculated SPL values can only be reproduced precisely using the appropriate
test signals. In (live) music applications, differences may occur as a result of
different spectra and crest factors.
To learn more about how to simulate sound reinforcement scenarios and handle
EASE Focus and EASE 4.2 simulation programs, functions, and parameters, see
the given program’s manual or online help (http://www.easefocus.de/down-
loads.html). You’ll find a description of functions and options of the generic
loudspeaker library file (CADIS.GLL) embedded in EASE 4.2. Open this descrip-
tion by clicking the Embedded Files button in CADIS.GLL. To access it in the
EASE GLL Viewer, open CADIS.GLL, go to the File menu, and select the option
Embedded Data Files.
D CADIS™ Aiming Software Setups with EASE Focus
E Controlling CADIS™
You have two options for controlling a CADIS™ system:
• In two-way active mode, the FIRNET serves as a stereo FIR controller.
• In tri-amped mode, the amps drive the CAD 208 speakers directly, without
internal X-overs.
You have a choice of two amps for powering the system, and the appropriate
filter settings are available for each:
• FIRNET Linear Phase Controller / VX2400 power amp (abbreviated VX in the
following)
• FIRNET Linear Phase Controller / LAB.gruppen FP 10000Q (abbreviated FP in
the following)
,
Note: When operating your system, always ensure components are connected
properly and the correct gain settings are dialed in at the controller and on
the power amps. For more on this, see section F, Controllers and Controller
Software.