# This is a makehrtf HRIR definition file.  It is used to define the layout
# and source data to be processed into an OpenAL Soft compatible HRTF.
#
# This definition is used to transform the SOFA packaged KEMAR HRIRs
# originally provided by Bill Gardner <billg@media.mit.edu> and Keith Martin
# <kdm@media.mit.edu> of MIT Media Laboratory.
#
# The SOFA conversion is available from:
#
#  http://sofacoustics.org/data/database/mit/
#
# The original data is available from:
#
#  http://sound.media.mit.edu/resources/KEMAR.html
#
# It is copyrighted 1994 by MIT Media Laboratory, and provided free of charge
# with no restrictions on use so long as the authors (above) are cited.

# Sampling rate of the HRIR data (in hertz).
rate     = 44100

# The SOFA file is stereo, but the original data was mono.  Channels are just
# mirrored by azimuth; so save some memory by allowing OpenAL Soft to mirror
# them at run time.
type     = mono

points   = 512

radius   = 0.09

# The MIT set has only one field with a distance of 1.4m.
distance = 1.4

# The MIT set varies the number of azimuths for each elevation to maintain
# an average distance between them.
azimuths = 1, 12, 24, 36, 45, 56, 60, 72, 72, 72, 72, 72, 60, 56, 45, 36, 24, 12, 1

# Normally the dataset would be composed manually by listing all necessary
# 'sofa' sources with the appropriate radius, elevation, azimuth (counter-
# clockwise for SOFA files) and receiver arguments:
#
#   [  5,  0 ] = sofa (1.4, -40.0,   0.0 : 0) : "./mit_kemar_normal_pinna.sofa"
#   [  5,  1 ] = sofa (1.4, -40.0, 353.6 : 0) : "./mit_kemar_normal_pinna.sofa"
#   [  5,  2 ] = sofa (1.4, -40.0, 347.1 : 0) : "./mit_kemar_normal_pinna.sofa"
#   [  5,  3 ] = sofa (1.4, -40.0, 340.7 : 0) : "./mit_kemar_normal_pinna.sofa"
#   ...
#
# If HRIR composition isn't necessary, it's easier to just use the following:

[ * ] = sofa : "./mit_kemar_normal_pinna.sofa" mono