Drop into a rehearsal for Songs of Ascension, the work-in-progress collaboration between Meredith Monk and Ann Hamilton. Performances are tonight through Saturday at the Walker Art Center’s McGuire Theater.

To launch an exhibition of her drawings at the Walker, Trisha Brown performed on paper Thursday night — drawing in the Medtronic Gallery with cameras rolling and an audience packing the Walker Cinema to watch her process as it happened.

Trisha Brown has spent much of this week at the Walker Art Center working with local dancers on the nuances of her choreography and preparing to perform a drawing tonight to launch an exhibition of her works on paper, So That the Audience Does Not Know Whether I Have Stopped Dancing. On Wednesday, in the Walker’s Medtronic Gallery, Brown coached a handful of Twin Cities dancers — Emily Johnson, Sally Rousse, Morgan Thorson and Galen Treuer among them — to work out the curves of Brown’s 1968 piece Planes. Brown’s own company performs April 25 at Northrop Auditorium.