utils/MIT_KEMAR_sofa.def

   1 # This is a makemhr HRIR definition file.  It is used to define the layout and
   2 # source data to be processed into an OpenAL Soft compatible HRTF.
   3 #
   4 # This definition is used to transform the SOFA packaged KEMAR HRIRs
   5 # originally provided by Bill Gardner <billg@media.mit.edu> and Keith Martin
   6 # <kdm@media.mit.edu> of MIT Media Laboratory.
   7 #
   8 # The SOFA conversion is available from:
   9 #
  10 #  http://sofacoustics.org/data/database/mit/
  11 #
  12 # The original data is available from:
  13 #
  14 #  http://sound.media.mit.edu/resources/KEMAR.html
  15 #
  16 # It is copyrighted 1994 by MIT Media Laboratory, and provided free of charge
  17 # with no restrictions on use so long as the authors (above) are cited.
  18
  19 # Sampling rate of the HRIR data (in hertz).
  20 rate     = 44100
  21
  22 # The SOFA file is stereo, but the original data was mono.  Channels are just
  23 # mirrored by azimuth; so save some memory by allowing OpenAL Soft to mirror
  24 # them at run time.
  25 type     = mono
  26
  27 points   = 512
  28
  29 radius   = 0.09
  30
  31 # The MIT set has only one field with a distance of 1.4m.
  32 distance = 1.4
  33
  34 # The MIT set varies the number of azimuths for each elevation to maintain
  35 # an average distance between them.
  36 azimuths = 1, 12, 24, 36, 45, 56, 60, 72, 72, 72, 72, 72, 60, 56, 45, 36, 24, 12, 1
  37
  38 # Normally the dataset would be composed manually by listing all necessary
  39 # 'sofa' sources with the appropriate radius, elevation, azimuth (counter-
  40 # clockwise for SOFA files) and receiver arguments:
  41 #
  42 #   [  5,  0 ] = sofa (1.4, -40.0,   0.0 : 0) : "./mit_kemar_normal_pinna.sofa"
  43 #   [  5,  1 ] = sofa (1.4, -40.0, 353.6 : 0) : "./mit_kemar_normal_pinna.sofa"
  44 #   [  5,  2 ] = sofa (1.4, -40.0, 347.1 : 0) : "./mit_kemar_normal_pinna.sofa"
  45 #   [  5,  3 ] = sofa (1.4, -40.0, 340.7 : 0) : "./mit_kemar_normal_pinna.sofa"
  46 #   ...
  47 #
  48 # If HRIR composition isn't necessary, it's easier to just use the following:
  49
  50 [ * ] = sofa : "./mit_kemar_normal_pinna.sofa" mono
  51