Explanation for data files inside source package according to
  http://lists.debian.org/debian-devel/2013/09/msg00332.html

This package contains sample data files for experimenting with
the implemented algorithms.

Here comes a description of the single data files:

Files: debian/replacement_files/*.stm debian/replacement_files/*.ctm
Documentation:
  ref.stm contains a manually crafted sample reference file in STM format;
  the reference is not related to any real audio file. The reference covers
  the transcriptions of six non-existant identical audio files. In each
  file eight speakers are supposed to pronounce the words "a b c d e f g"
  in half a second. Each file is thus 4 seconds long.
  ref.ctm represents the same information in CTM format. The speaker
  information is missing, but we have the additional information about
  the exact timing for each word.
  sys1.ctm has been obtained from ref.ctm by deleting some random lines.
  sys2.ctm has been obtained by introducing systematic errors for spk1,
  by deleting all the lines starting at time 0.45. Then some random lines
  has been deleted.
  sys3.ctm has been obtained by removing the transcriptions for file5 and
  file6.
  sys1.ctm, sys2.ctm and sys3.ctm were created only for display purposes,
  so that graphs generated by sc_stats can be understood.

