If you tell me which (e.g., PS1, PS2, Sega Saturn) your files are for, I can recommend the exact command to ensure you don't lose any audio data during the process.
Converting a (Compressed Hunk of Data) file back to an ISO is a common task for retro gamers and archivists who need a more universally compatible format. While CHD is superior for saving storage space—often reducing file sizes by up to 70%—it is mostly used by specific emulators like MAME, RetroArch, and DuckStation. If you need to burn the game to a physical disc or use it with older software, you must revert it to an ISO. The Core Tool: CHDMAN convert chd to iso
chdman extract -i disc.chd -o disc.cue -ob disc.bin If you tell me which (e