Note: the information
below concerns the current CATT-Acoustic™, the
new CATT TUCT™ has essentially
the same features but aurlization is more general and much easier
to use , see overview.
general auralization method
that is the result of 17 years of development and experience of
auralization
and, just like the prediction method, it employs several different
techniques.
For special cases also an ISM-based method can be used
44.1 or 48 kHz operation
full bandwidth auralization
by using extrapolation where necessary
binaural, microphone, stereo,5-channel
or B-format (also 2nd order RSTUV an 3rd order KLMNOPQ) post-processing.
5-channel mic setups can be exchanged with PureVerb.
CATT-Walker™ real time
walkthrough visualization and auralization:
IOA Copenhagen
2006 paper and presentation download
sample CATT-Walker™
screen
multiple
source walkthrough
visualization (all
sources using the same anechoic inoput -
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).
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. at 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)
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
open interface for use entry of HRTFs at a
basic
resolution, other resolutions from case to case.
IACC calculation for binaural
responses (Inter-Aural Correlation Coefficient)
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.)
5-channel replay/setups/simulations
for special-purpose tests (e.g. 5-channel recording techniques)
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 filers for IR listening
optional
direct impulse response output to 16-bit WAV, 32-bit WAV, MATLABor MLSSAformats.
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 (so far 4 distinct
HRTF sets are available and 10-15 headphone filters). Headphone
equalization
and HRTFs in user Preferences
sample rate conversion tool
also to 16, 22.05, 88.2 and 96 kHz (integer ratios)
impulse response filtering tool (headphone
eq, cross-talk cancellation, general FIR eq)
impulse response viewing tool (windowed IRs and frequency
responses, spectrograms, play IR)
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 rotationsfor 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 in
real time and with low latency for virtual reality applications using Lake
Technology hardware where also loudspeaker replay using Ambisonic
and dynamic auralization with head-tracking can be selected
can also be performed using the CATTMultiVolver
(up to 8x8, e.g. 8 sources and 5-channel responses = 8x5).
anechoic WAV-file info compilation
(scale-factor, level in octave-bands, reference etc.)
WAV-file player with single-file,
A/B and play-list functions (runs automatically after a convolution)
full version users are automatically
also licenced for The
FIReverb
Suite™