: CHD files are highly recommended for modern emulators like
| Feature | ISO/BIN | PBP (PSP) | CHD | |--------|---------|-----------|-----| | Lossless | ✅ | ❌ (optional compression loss) | ✅ | | Multi-disc support | Manual | Yes (but PSP-specific) | Yes (via M3U playlists) | | Subchannel preservation | Partial | No | ✅ | | Average compression ratio | 0% | ~35% | ~40-50% | | Emulator compatibility | Excellent | Moderate | High (DuckStation, RetroArch) | Psx Chd Japan -