Improviser, composer, and percussionist Tim Feeney works with deceptively simple materials, both physical and sonic: the sound of two stones scraped slowly across one another; the reverberant impact of these stones struck hard together in a resonant concrete building; the change that results if a person walks slowly around that building while striking the stones together; the memory of pulling these stones out of a river on a trip 12 years in the past. Feeney improvises with Boston stalwart Vic Rawlings, builder of a unique hyper-instrument assembled via extensive preparation of a standard cello, and an electronic console collected from unstable exposed circuitry. He then presents the premiere of Music of what happens, a text folio collaging improvisation and folk materials, performed by Cassia Streb, Cody Putman, Jessika Kenney, Laura Steenberge, and Mustafa Walker.