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→CHD Compression: Demul has a CHD plugin that it defaults to for Dreamcast GD images. Kinda necessary to have CHD support for it to use MAME arcade sets.
* '''Can be reverted?''' Yes, using extractcd (included with MAME)
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' Only MAMEand Demul. Some libretro cores for other emulators started adding support.
MAME uses the CHD format for disc images in general and includes tools to convert from and to it. It uses 7zip's LZMA compression on the game data and lossless FLAC compression for the audio data to optimize compression even further than with the BIN+CUE+MP3/WAV data separation alone.
