@YamiDragon, this is enough proof to prove there is a Sound Village because if it wasn't why were they allowed to take the Chuunin Exam in the 1st place. Also as for the part "In actuality, Otogakure is not really a village, but a giant laboratory composed of various hideouts and bases scattered throughout the Land of Sound and various other countries." Only means there is no specific location of the village like how there's a town village like the others.