From now until March 1, we are opening applications to the Sō Percussion Summer Institute (SōSI!), where for two weeks in July, (our 15th anniversary) professional-track composers and performers come together to study, experiment, collaborate, and perform, led by the members of Sō Percussion, composition faculty Andrea Mazzariello and Sarah Kirkland Snider, a diverse array of guest artists, Princeton faculty, and other special guests.