Listen to Frogs, Dense, Mid Spring, Swamp1 Sound Effect online. Frogs, Dense, Mid Spring, Swamp1 Sound Effect is an English language song and is sung by Pro Sound Effects Suite. Frogs, Dense, Mid Spring, Swamp1 Sound Effect, from the album Pro Sound Effects Suite, Vol. 31: Amphibians, Horses and Insects, was released in the year 2007. The duration of the song is 1:53. Download English songs online from JioSaavn.