ImgBurn relies on DirectShow / ACM for decoding your audio files.   As such, you'll need to have the appropriate filters installed for the types of files you'll be burning.   Support for MP3, PCM, WAV and WMA should be built into Windows - at least it is on XP / Vista / 7.   For other file types, try the following:   AAC - CoreAAC - http://www.free-codecs.com/download/CoreAAC_Directshow_filter.htm AAC - ORBAN - http://www.orban.com/plugin/ or http://www.free-codecs.com/download/aac_aacplus_player_plugin.htm APE - Monkey's Audio - http://www.monkeysaudio.com/ FLAC - madFlac - http://forum.doom9.org/showthread.php?t=130498 ( http://madshi.net/madFlac.rar ) M4A - CoreAAC - http://www.free-codecs.com/download/CoreAAC_Directshow_filter.htm M4A - ORBAN - http://www.orban.com/plugin/ or http://www.free-codecs.com/download/aac_aacplus_player_plugin.htm MPC - Radlight - http://www.free-codecs.com/download/RadLight_MPC_DirectShow_Filter.htm OGG - CoreVorbis - http://www.free-codecs.com/download/CoreVorbis.htm OGG - Radlight - http://www.free-codecs.com/download/RadLight_Ogg_Media_DirectShow_filter.htm OGG - xiph - http://www.xiph.org/dshow/ WV - WavPack - http://www.wavpack.com/downloads.html or http://code.google.com/p/wavpack-directshow/downloads