CATT-Acoustic v9.1

Directivity Module

• supports the CLF format:
• CF1, CF2: The Common Loudspeaker File Format (CLF). The CLF was released announced Apr 15 2005, CATT-Acoustic supports the CLF format since May 25 2005. For a background to the CLF, and download of a free viewer with sample files, and a trial authoring version go to the CLF web page: http://www.clfgroup.org.
• supports the CIF format:
• CI1, CI2: The Common Instrument File Format (CIF). The CIF was released Oct XX 2020, CATT-Acoustic supports the CLF format relese from v9.1f. For a background to CLF and CIF, and download of a free viewer with sample files, and a trial authoring version go to the CLF web page: http://www.clfgroup.org.
• offers four types of native directivities:
• SD0 based on interpolation from 15º horizontal and vertical polar diagrams. Visual editing or text import/export.
• SD1 based on interpolation from measured 10º full space data. This kind of data can be requested from most loudspeaker manufacturers (to a high degree it is now replaced by the CLF). Visual editing or text import/export.
• CTA (CATT-Acoustic Text Array) text-based array modeling (new with v9.1 and a major improvement over the previous DDI first released 1998)
  
• open text input format that after pre-processing is saved as a binary format CBA (CATT-Acoustic Binary Array) for use at actual prediction in TUCT. Even if the text format is open it offers optional encryption of filters and optional file encryption after an array design is finished.
• manufacturers that want to support the CTA format can design their arrays also using the demo version but the demo will not allow actual prediction in a room using the arrays. If export from a manufacturer's direct sound aiming software is desired it, to e.g. protect DSP-steering know-how, it can be directly exported to an encrypted CTA format via calling a a small DLL function supplied, similarly if filters are to be encrypted. If an array does not have beam steering, such as passive column array, the manufacturer can directly save it as CBA and provide to users along with any directivity files it uses (typically CF2).
• flexible format with many options such as: symbolic constants and strings, comments, expressions, FIR filters (WAV, MAT, plain binary simge or multi-filter files optionally encrypted, if IIRs are used they can easily be converted to FIRs), special modular Line Elements for high-frequency line elements typically used in curved line-arrays, weights, delays, polarity, templates for common types (passive column arrays, curved line-arrays) 
• installation includes examples of passive arrays, DSP-sterred arrays, curved line-arrays, and an array using a ribbon
• array displays
  
• impulse and frequency responses
• slice rendering
• SDX, new from v9.1e, an artifical cookie-cut sector directivity directivities to be used with anechoic sound recorded in sectors surrounding e.g. a grand piano or a string quartet (replaces the SECTOR0 SD2 that required using TUCT1)
  
• user organized collections of directivities based on e.g. brand, type or favorites. 
• 3D visuals using CATT Marker files model via GEO (or created from CLF fomat 3D cabinet info) 
• optional data locking to prevent accidental change of directivities 
• 3D-balloons, color shading optional
• contours
• polar graphs, many options especially for CTA

	sample graphics/screen-shots SD0, SD1, CF1, CF2, CI1, CI2
	sample graphics/screen-shots CTA/CBA arrays

• The former DLL Directivity Interface (DDI) interface (using SD2-files) described below is since June 2012 no longer developed and any later made DLLs are not actively supported by CATT. Use of the DDI will remain possible for some time but requires use of TUCT v1 mainly for old projects that may require use of old DDI modlues. To support this v9.1 also includes TUCT v1.1b. If old projects are used, based on the source-fle format using SOURCEDEFS, TUCT v1 will run while if the new source-file format, using SOURCE data blocks, is used TUCT v2 will run enabling use of the new CTA array modeling and many other TUCT v2 addtitions.

• SD2 based on the DDI. SD2 offers array modeling and can handle extended near-fields. DDI lets a manufacturer offer high-resolution data even before a new file-format is agreed on. It also offers data hiding and hiding of intellectual property (e.g. for DSP-controlled arrays or other special designs). For further details download a DDI white paper in PDF-format and the 108th AES convention (Paris Feb 19-22, 2000) workshop presentation viewgraphs. The CATT DDI has been available since 1998 but only during 2001 that competing software (even those specialized in sound system design) are realizing that a similar interface is required to handle arrays properly.
  Current DDI-modules are:
• CATT_Generic for general not brand-specific array modeling: a module for
• general array modeling e.g. Duran Audio TARGET arrays with FIR-filter weights (each transducer is described by its 3D location, SD0, SD1, CF1 or CF2 directivity pattern, 3D aim, octave-band or FIR-filter weights, delay, optional absolue calibrated). Here also the SD3 5º format with optional phase information can be used.
• distance-dependent 3D-balloon interpolation (can speed up full-blown array calculations with 10-100 times while retaining the nearfield handling at the expense of a 10º resolution, to be used for faster initial aiming).
  
• artifical sector-based directivities to be used with anechoic sound recorded in sectors surrounding e.g. a grand piano or a string quartet (replaced by the SDX directivity format for TUCT2 use)
• CATT_Generic has an open text-based interface but includes a way to save am encrypted settingsfile to prevent altering.
  
• for Duran Audio's AXYS Intellivox series DSP-controlled columns arrays (including all beam-steering options)
• for L-Acoustics' V-DOSC and dV-DOSC arrays (released 29-AUG- 2001, absolute calibration update MAR-2004). A later L'Acoustics DLL was developed after June 2013. 
• for Nexo Geo line arrays (Geo S8 released 27-JUN-2003. Geo T released MAR-2004, Geo D released OCT-2006)(Req. at least v8.0b:2), Geo S12 released 7-OCT-2010.
• for Outline Butterfly line arrays (released MAR-2004)(Req. at least v8.0b:2)
  
• for ActiveAudio's StepArray DSP-controlled columns arrays SA100P, SA180P, SA180S, SA250P, SA250S, SA400P, SA400P , SA180S (updated 5-JUL-2011 with the Ray-On 100 array)
• for PanBeam DSP-conrolled column arrays (released 11-JUL-2007, P32 and PB40 added 18-SEP-2007), requires v8.0g
• for Renkus-Heinz Iconyx DSP-controlled column arrays.
• for d&b audio J-series curved line arrays
• for Ateïs International Messenger column arrays (released 10-FEB-2010)
• for Tannoy QFlex column arrays (released 19-AUG-2010 (updated with QFlex64 21-MAY-2013
• SD3 5º full space data optionally with phase (for array modeling via the DDI)
  
• text export from SD2 to SD0 or SD1
• parameter control of SD2 e.g. beam steering, beamwidth and focus (manufacturer/model dependent)
  
  

  sample graphics/screen-shots SD2 arrays