For the USA version of House Trap , this preservation is crucial. The game features voice acting and sound effects that are surprisingly authentic to the era. The boing of a spring, the crash of a vase, and the orchestral stings that play during a chase are essential to the experience. A bad rip would lose these nuances, flattening the soundscape. Playing from a high-quality .chd ensures that the player hears the game exactly as it sounded on a CRT television in 1999.