I've started an open source project to develop a set of tools to author and play DVD-Audio. The project is NOT dealing with the encryption/watermarking systems or MLP, so it will not allow you to play commercial DVD-Audio discs. The purpose is to enable users to create high quality DVD-Audio discs containing their own recordings that will play on hardware DVD-Audio players. The specific goals are the following: 1) Authoring of DVD-Audio discs contain uncompressed LPCM audio using any of the supported samplerates, bit-depths and channel configurations. 2) Playback of those discs in a PC 3) Extraction of the audio back from the DVD-Audio disc so that the MD5 checksums match those of the source audio. The project home page is here: http://dvd-audio.sourceforge.net I have now documented enough of the format of the files in the AUDIO_TS directory to write a basic authoring program, and that is what I am working on first. Playback and extraction will come later. Any contributions to the documentation on that site would be gratefully received - it doesn't have to be low-level documentation, even just high-level descriptions of the capabilities of DVD-Audio would be useful. There is a mailing list (follow the link from the above page) for discussion about the project.