Solution: CHD compression is lossless, so the audio is there. This is usually an emulator audio driver issue. Switch from XAudio2 to SDL or DirectSound.

Final Fantasy VII (Japan) (Disc 1).chd Final Fantasy VII (Japan) (Disc 2).chd Final Fantasy VII (Japan) (Disc 3).chd Use code with caution.

PlayStation games use CD-ROMs, which hold up to 700MB of data. Many of these discs contain large amounts of empty space or uncompressed audio. The CHD format uses lossless compression (like LZMA and FLAC) to shrink file sizes dramatically. On average, a CHD conversion reduces a PSX game's file size by without losing a single byte of data. 2. Single-File Cleanliness