Founded at the end of 2021, Circle of Thirds is a four-piece jazz band fusing keyboards, drums, bass and guitar into a tapestry of varied jazz styles. Three of the band's four members, Jacob Arnold, Valdimar Sigurtson and James Doughety, recently came to the Firmin-Garner Performance Studio to talk about their music, and to give us a sampler, with help from the Mary Baker Rumsey Steinway piano.