He downloaded the archive, expecting the usual regional variants or perhaps a lost Japanese dating sim. Instead, he found a single file: Project_Echo.chd
– Depending on the size of your collection, conversion may take several hours. For a typical 45‑game library, the process might take about an hour on modern hardware.
It is included with the emulator binaries. Download the latest MAME version for your OS and extract the chdman executable. chd psx roms exclusive
Originally designed by Sony for PSX playback on the PlayStation Portable (PSP). While it supports multi-disc compression into a single file, it uses a lossy compression method that can occasionally cause compatibility bugs on modern PC or Android emulators.
For games requiring subchannel (e.g., Legend of Legaia ): He downloaded the archive, expecting the usual regional
For Unix‑like systems, a simple shell script accomplishes the same task:
If you are planning to play CHD‑format PS1 games, you will need an emulator that understands the format. Fortunately, most modern PlayStation emulators now include native CHD support. It is included with the emulator binaries
Do you have (like Final Fantasy) that you need to manage? Are you running into any error messages during compression?