CATT-Acoustic v9.1

 Auralization

• TUCT™, the prediction/aurlization core of CATT-Acoustic™, directly performs auralization after completed prediction, just click Play/Convolve, see TUCT overview
  
• CATT-Walker™ v1 an v2 - real time walkthrough visualization and auralization:
• IOA Copenhagen 2006 Walker v1 paper and presentation download
   

  sample CATT-Walker™ v1 and v2 screens

• multiple source walkthrough visualization (all sources using the same anechoic input - typically for PA systems)
  
• optional use as an "acoustics engine" together with separate VR real time graphics (via e.g. TCP/IP using the Walker Steer SDK, available separatelly for full version users).
• v2 (released with v9.1b)
• many play types: binaural for headphones, omni mic, XY or Blumlein stereo mics, B-format channel, IR listening, and anechoic input.
• when the playing is stopped the end reverberation itself will be heard
  
• mapping of measures with palette options
• a flexible settings-file format with optional auto-run for presentations, TUCT2 can directly run Walker v2
• based on the CATT 3D-Viewer so current users are already familiar with its use
  
• Steer 2 not requring a DLL, 32- or 64-bit, can also be used for scripting walks using basic programming not requiring a GUI.
• requires the CAG-file format use by TUCT2 (TUCT1 use will mean using CATT-Walker v1)
• a floating Audio Control for volume +/-, muting, selection of play type and with cpu and level meters
• 3D camera mode or a mode where instead of seeing what the camera sees the camera can be viewed from e.g. above
• educational both for consultant and teaching use and for explaining auralization to clients
  
• v1
  
• binaural output for headphones
• B-format output (requires a 4-channel capable soundcard to be installed and selected and an ambisonic decoder to be used externally or via e.g. Virtual Audio Cable (VAC) that creates a virtual sound card making it possible to feed the B-format output of Walker to another application on the same PC (e.g. a VST host) with an Ambisonic decoder plugin) 
• Steer 1, requires writing a 32-bit DLL for commication via sever and client 
• requires an older CAG-file format (created by TUCT when export data for Walker v1)
• 3D camera mode only
• will not be developed further but remains in the installation
  
• HRTFs may have arbitrary resolution
• Several HRTF sets provided
• a person's HRTFs
• ITA-Kunstkopf
  
• KEMAR artificial head measured by Bill Gardner and Keith Martin
• the Listen project public HRTF (51 sets)
  
• analytical sphere HRTFs
• open interface for user entry of HRTFs at a basic resolution, other resolutions from case to case.
  
• IACC calculation for binaural responses (Inter-Aural Correlation Coefficient) 
• direct multiple source auralization using the same anechoic source (typically for PA systems) or using different anechoic sources (e.g. auralization of stereo speakers, background noise + speech etc.)
• loudspeaker replay of simulated or recorded binaural sound via loudspeakers using cross-talk cancellation filters. General implementation where loudspeaker positions are selected and with optional individual loudspeaker correction. Many options for creating the cross-talk filters.
• CD with anechoically recorded source material included with full versions
• Some useful WAV-file filters for IR listening
  
• optional direct impulse response output to 16-bit WAV, 32-bit WAV, MATLAB and Lake SIM formats as: 
• binaural
  
• 5-channel (C L R Ls Rs), many options
• B-format (1st, 2nd or 3rd order)
• XY-stereo
• Blumlein stereo
• mono mics (omni, cardioid, supercard, hypercard, fig-of-8)
  
• file-conversion utilities (MATLAB .MAT, MLSSA .TIM, .WAV, Lake .SIM,...)
• general and secure handling of HRTF libraries and headphone equalization filters enables licensing of HRTF libraries and headphone filters from various sources. Headphone equalization and HRTFs in user Preferences (HRTFs and headphone eq can be changed after a calculation)
• software convolution: 
• at real-time speed of anechoic music/speech with synthesized impulse responses, direct listening to impulse responses
• at real-time speed with 16-, 24- or 32-bit impulse responses in WAV-format (e.g. measured impulse responses), direct listening to impulse responses. See also the free GratisVolver™.
• for walkthrough including fast head rotations for synchronization to graphics walkthrough from e.g. 3ds max. Walkthrough can be created as binaural, cross-talk cancelled binaural, 5-channel or B-format (for Ambisonic). Included is a tool WalkDecim that converts a camera path exported from a 3D rendering software to a receivcer list and a walkthrough convolver script.
• can also be performed using the CATT MultiVolver VST or WCP. (WCP allows for in x out up to 36 x 16).
• WAV-file player with single-file, A/B and play-list functions
• full version users are automatically also licenced for The FIReverb Suite™, ReflPhinder™, and GratisVolver Pro™