anchor.diff:  2005;Real Audio 3;2CC;A;;;RealAudio 3/4/5 Music (DNET)
   2006;AAC;2CC;A;AAC;;RealAudio 10 AAC (RAAC)
   2007;AAC+;2CC;A;AAC;;RealAudio 10 AAC+ (RACP)
  -3313;AviSynth;2CC;A;;;makeAVIS (fake AVI sound from AviSynth scripts)
  -4143;AAC;2CC;A;AAC;;Divio MPEG-4 AAC audio
  +3313;AviSynth;2CC;A;;;makeAVIS (fake AVI sound from AviSynth scripts);
  +4143;AAC;2CC;A;AAC;;Divio MPEG-4 AAC audio;
   4201;Nokia;2CC;A;;;;
   4243;ADPCM;2CC;A;ADPCM;;G726;
   43AC;Lead Speech;2CC;A;;;;
  
positive.code: FFFF;In Development;2CC;A;;;In Development / Unregistered;
  S_TEXT/UTF8;UTF-8;Mk;T;;;UTF-8 Plain Text;
  S_TEXT/SSA;SSA;Mk;T;;;Sub Station Alpha;
  S_TEXT/ASS;ASS;Mk;T;;;Advanced Sub Station Alpha;
  S_TEXT/USF;USF;Mk;T;;;Universal Subtitle Format;
  S_IMAGE/BMP;Bitmap;Mk;T;;;Basic image based subtitle format
  S_VOBSUB;VobSub;Mk;T;;;The same subtitle format used on DVDs
  
negative.code: 1400;NORRIS;2CC;A;;;Norris Communications, Inc.;
  1401;ISIAUDIO;2CC;A;;;ISIAudio;
  1500;MUSICOMPRESS;2CC;A;;;Soundspace Music Compression;
  181C;RT24;2CC;A;;;VoxWare RT24 speech codec
  181E;AX24000P;2CC;A;;;Lucent elemedia AX24000P Music codec
  1971;SonicFoundry;2CC;A;;;Lossless
  1C03;ADPCM;2CC;A;ADPCM;;Lucent SX5363S G.723 compliant codec
  1C07;SX8300P;2CC;A;;;Lucent SX8300P speech codec
  