An inmate plays a saxophone as he performs with professional musicians during a jazz concert held at Saint-Quentin-Fallavier prison in Saint-Quentin-Fallavier, eastern France.

Trumpets behind bars: Meet the prisoners playing jazz with the musicians of Jazz à Vienne

"When I come to the music workshop, I'm not in prison", says one of the inmates at the Saint-Quentin-Fallavier detention centre in France, where prisoners played with musicians of the 'Jazz à Vienne'