Haunted House Echo Sound Effects Voice Distorter uses a microphone and .WAV files (11kHz 16 mono). Also provides echo sound effects and phase shift sound effects. This makes your voice sound low or higher than it really is. People will not recognize your voice when they here it. Inlcuded sound effects are : howling wind, baby crying, whispering, squeaky door, chain rattling, wind, and you can add more sounds that you record.