Historically, indigenously, drums were used for message systems in Africa and America. Horns were used in hunting.
Music is not confined to leisure time.
Charles
Work song
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A work song is a piece of music closely connected to a specific form
of work, either sung while conducting a task (often to coordinate
timing) or a song linked to a task or trade which might be a connected
narrative, description, or protest song.
Contents [hide] 1 Definitions and categories 2 Hunting and pastoral songs 3 Agricultural work songs 4 African American work songs 5 Sea shanties 6 Cowboy songs 7 Industrial folk song 8 See also 9 Notes 10 External links
http://en.wikipedia.org/wiki/Work_song