This vocal quartet applies their refined musicianship, interpretive detail and a modern sensibility to its varied repertoire, which ranges from austere medieval melodies to cutting-edge contemporary works. The group takes their music very seriously, but certainly knows how to have fun. Last year, they held a competition to allow people to remix traditional Gregorian chants that they had recorded; they chose the best submissions and are now selling a digital EP featuring the original chants and the remixes.