Behind the perimeter of the Villawood detention centre in western Sydney lies a secret world little known to outsiders.
Over-crowding and prolonged processing have led to many detainees suffering from severe pyschological problems.
One way of coping is the soothing power of music, thanks to a program run by volunteers.
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SBS' Marion Ives has gone behind the wire, amid tight media restrictions, for an exclusive look at how the program is working.
