Great Music on Sundays @5 presents “Marimba and Piano Global Rhythms” on Sunday, Aug. 2 at 5 p.m. This free live-streaming concert, with Brian Calhoon on marimba, John Thomas on piano, and Chanthoeun Varon Collins on cello, includes music from Argentina, Bulgaria, Italy, Romania, and the U.S. For details, go to ptownmusic.com.