As members of punk-jazz group UYA (aka Upstanding Young Americans), pianist Rodger Coleman, drummer Sam Byrd and their bandmates made a righteous racket in the nightclubs of Boston and New York City in the early ’90s. UYA’s version of Sun Ra’s “Dancing Shadow” can be heard on the Sun Ra tribute record Wavelength Infinity (which also features tracks by The Residents, Travis Shook, and Eugene Chadbourne and Jimmy Carl Black, to name a few). Coleman now lives in Kingston Springs with his wife and works as a paralegal, but he’s gotten back into music recently. When Byrd, who now lives in Richmond, Va., comes to visit his wife’s family in Nashville, the two musicians get together to whoop up some improvisational mayhem at Coleman’s home studio. On the duo’s recordings at archive.org, you can hear Sun Ra’s influence, as well as Cecil Taylor and even the Grateful Dead — Coleman’s blog NuVoid reveals his love for the Dead (among many other bands), and you can hear faint echoes of Europe ’72 ’s “Prelude” on Coleman/Byrd tracks such as “For the Sake Of” and “Divide By Zero.” This installment of Zeitgeist’s Indeterminacies series will be hosted by Blair School of Music professor Stan Link.