The studios are in the MPR Broadcast Center on Cedar Street in downtown Saint Paul.

[2] KNOW-FM carries a mix of local and national public radio news and information programs.

Its HD2 digital subchannel offers "Radio Heartland," a folk and Americana music service.

MPR changed its call sign to KSJN and used it to simulcast its FM sister station, 91.1 KSJN-FM.

It offered NPR news and information shows in morning and afternoon drive time, with mostly classical music in middays, nights and weekends.

It began airing an expanded lineup of NPR programming, including shows that were not available on the FM's schedule.

The AM signal was later spun off into a for-profit subsidiary to help fund the public broadcaster, and was eventually sold.

That station has since returned to using the WLOL call sign and it airs Catholic religious programming.

With MPR's two FM frequencies in the Minneapolis-St. Paul market, listeners can choose between news and information on 91.1 KNOW-FM and classical music on 99.5 KSJN-FM.

A third station in the area was also acquired by MPR, 89.3 KCMP in Northfield, which plays adult album alternative (Triple-A) music.