Joel Harrison Septet

If the string quartet arrangements on the guitarist’s new Paul Motian tribute disc are any indication, this chamber ensemble’s original pieces will be luminous tonight. Well known as an intrepid improviser, Harrison has been honing his written material of late. For this latest piece, deemed “Singularity,” he turns to Ives and Messiaen for tonal strategies, and colleagues such as bassist Stephan Crump and saxophonist Donny McCaslin for craft. Expect balance, warmth, and singularity.

Sat., Dec. 4, 9 & 10:30 p.m.; Sun., Dec. 5, 8:30 p.m., 2010