Naturally 7 Wall of Sound (Video) 1 discussions A video of "Vocal Play" group Naturally 7 creating their "Wall of Sound" with vocal play. Everything you hear is the human voice! No instruments are used. A loop pedal is used to loop some sounds like.. Tags: WallofSound VocalPlay Naturally Seven N7 acappella Beatbox pop r&b intheairtonight parissubway 76raven