Though Wilco is a band known for its songs, both guitarist Nels Cline and drummer Glenn Kotche have deep roots in the improvisational jazz world. On April 21, the two members of Wilco join will painter Norton Wisdom for an event dubbed Sonic/Vision. The performance will take place in Hanover, NH at Dartmouth College’s Spaulding Auditorium and will feature “a night of music, art, animation and improvisation.” The Nels Cline Singers will perform at San Francisco’s The Independent tonight.