On Saturday, April 20 at 8 p.m., the Princeton Laptop Orchestra (PLOrk) performs “Mirror Displays,” a free concert, at Taplin Auditorium in Fine Hall on the Princeton University campus. Rage Thormbones is special guest.

Pieces feature electronically processed tap dance, live-coded orchestra sounds, trombones equipped with custom electronics to provide musical control of feedback, a piece of music that is also a video game, live group-typed spoken work poetry, tap dance controlled lights, and a piece where the audience’s cell phones are part of the musical soundscape.

First performing in 2006, PLOrk takes the traditional model of the orchestra and reinvents it for the 21st century. Each musician performs with a laptop and custom designed hemispherical speaker that emulates the way traditional orchestral instruments cast their sound in space. It was founded by Dan Trueman and Perry Cook and is currently directed by composer and instrument designer Jeff Snyder, with new instruments that arise from his research.

For more information, visit plork.princeton.edu.