Outdoors on the Frist Lawn, the Princeton Laptop Orchestra (PLOrk) teams up with Early Music Princeton to form EMPLOrk, presenting a free concert that combines new works for live electronics with fresh electronic arrangements of music written in the 14th-17th centuries. Pieces by Gillaume de Machaut and Barbara Strozzi get a wild new treatment with custom-designed instruments from the New Instrument Research Lab. Piping-hot pieces by graduate student composers Jenny Beck, Gulli Björnsson, Liam Elliot, and Soo Yeon Lyuh, and undergraduate composer Lola Constantino round out the program with pitch-shifted ukeleles, spectrally-exploded harmonium, networked cellphones, homemade audio circuit feedback, and electronically-modified haegum (a traditional Korean bowed string instrument). The afternoon concert will be informal and you may come and go as you please.