KWMU started broadcasting in HD Radio in 2006. In the fall of 2008, the station added a second digital stream, KWMU-2 The Gateway (Now Jazz KWMU-2), on its second digital subcarrier. It airs mostly alternative and world music. In the spring of 2010, the station added a third digital stream, Classical 90.7 KWMU-3, a 24-hour classical music service. Both stream live on the Internet.