Over the past few years, there’s been an interloper in the dog days of summer, a period when the concert season slows to a trickle . The Time Spans festival, put on since 2015 by the Earle Brown Music Foundation Charitable Trust, has filled a bare corner of the New York calendar — not with seasonal pops, but with contemporary music of the most dense, bristly and brilliant variety.

This year’s festival has been the most expansive yet, extending to Battery Park City; an outdoor walk with headphones designed to amplify electromagnetic fields; and to the Goethe-Institut near Union Square, where the pianist Marino Formenti is in residence, literally — he’s living there while performing for 12 hours a day.

Mr. Formenti’s marathon continues through Aug. 28, but the final concert on the festival’s main series was Wednesday at the DiMenna Center for Classical Music in Midtown , featuring the piano-percussion quartet Yarn/Wire and the Talea Ensemble in music by composers with ties to Canada, a theme of this year’s Time Spans.