Helium Audio Joiner - Version 1.0 Helium Audio Joiner is a free, fully functioning, application that enables you to join multiple audio files into one single file. It provides comprehensive support for a large range of source and destination formats: AAC, FLAC, M4A, M4B, MP3, MP4, MPC, Ogg Vorbis, Wave, WAVPack and WMA.In addition, it enables you to insert silence between the joined tracks as well as editing and applying tags to the resulting file.