This is normal and intentional behavior. CD-ROM games (like PS1 titles) cannot store multi-track audio data inside a single, standard ISO container. The BIN file holds the raw data, while the CUE file acts as a text map telling the emulator or disc burner how to read it.
: Many legacy emulators or specific hardware loaders (like those used for the original PlayStation or Saturn) do not natively support the CHD compressed format. ISO is the "lingua franca" of disc images, ensuring your files work everywhere. Data Manipulation
# Create converter instance converter = CHDToISOConverter( chdman_path=args.chdman_path, output_dir=args.output_dir, verify=not args.no_verify, max_workers=args.jobs ) convert chd to iso
An ISO file is a standard disc image format that perfectly replicates the data of an optical disc, such as a CD or DVD. It contains an exact copy of the disc's file system and its contents. Unlike CHD, ISO files are ; they are a 1:1 representation of the original disc's user data, which is why they take up as much space as the original disc. This uncompressed, raw format is widely supported by almost all operating systems (Windows, macOS, Linux), virtualization software, and disc-burning utilities.
Are you converting these for a (like PS2 or Dreamcast) or for a particular emulator ? This is normal and intentional behavior
These two functions are for creating CHD files, not extracting them. However, they relate to the extraction commands. createcd is for CD-ROM images, while createdvd is for DVD-ROM images. As a rule of thumb:
Visit the official MAME website and download the latest MAME release for your operating system. : Many legacy emulators or specific hardware loaders
Note: For CD-based games, it is highly recommended to extract to .bin/.cue rather than just .iso to preserve audio tracks. Alternatively, for non-CD data files (DVDs): chdman extractdvd -i "input_game.chd" -o "output_game.iso" Use code with caution. Method 2: Using Batch Scripts (Faster for Multiple Files)
If you are burning games to real discs for hardware like the PlayStation 2 or Sega Dreamcast, your burning software (e.g., ImgBurn) requires an ISO or BIN/CUE format.
If you are using tools like for other formats, keep in mind that they are designed for conventional image formats (like ZIP or IMG) rather than specialized emulator compressed formats.