CARL RUSSO/Staff photo. DERRY NEWS: Londonderry high freshman, Rachel Winsor plays her violin backstage before the start of the Prism concert Saturday night. PRISM IS....Like a multitude of colors emanating from a crystal prism, the Prism Concert features a kaleidoscope of songs and instrumental arrangements performed in immediate succession from every possible angle.  The music is continuous and performers are set up in various positions throughout the room.  Emphasis is on popular music, jazz, and lighter concert fare with a few classical pieces added to the mix. Music students are put in the spotlight performing various songs, some write their own works. 11/2/2013.

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