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DDA (Direct Directivity Analysis)​

DDA is a powerful yet intuitive Windows application for accurately predicting the electro-acoustic performance of loudspeaker systems in (semi) open or closed spaces.  It includes 3D room acoustic modelling, direct sound simulation as well as statistical prediction of various acoustic parameters.

DDA supports all JBL point source loudspeakers with CLF data and all JBL Intellivox products.

Intellivox makes use of JBL's advanced beam shaping (DDS) technologies.  From DDA the radiation pattern of JBL Intellivox loudspeaker arrays can be controlled precisely and tailored to the shape and the acoustics of the space.  In addition, DDA offers various design tools which reduce design time and help the sound designer to optimise the system performance.  For installation and commissioning purposes DDA also generates FIR output filters which can be uploaded to supported DDS-controlled loudspeaker arrays using the JBL WinControl software (available in the Downloads section of this article.)

User Guide​​

The DDA v5.1 User Guide can be obtained from the Downloads section of this article:

DDA Basics and operation                   Page 3
DDA 2d Geometry Builder              ​    Page 34
Plane weighting                                   Page 43
​Import a Sketchup model into DDA     Page 49

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