Listen to Door, Knocks, Deep, Short, Soft, 3 Sound Effect online. Door, Knocks, Deep, Short, Soft, 3 Sound Effect is an English language song and is sung by Pro Sound Effects Suite. Door, Knocks, Deep, Short, Soft, 3 Sound Effect, from the album Pro Sound Effects Suite 38 - Doors, was released in the year 2007. The duration of the song is 0:01. Download English songs online from JioSaavn.