Want to hear some of the best musicians in Minnesota perform for free on a top-notch sound stage in St. Paul? And maybe get yourself seen on TV, too? That's what you get with TPT's "Lowertown Line" tapings, the fourth season of which was announced today with performers including Communist Daughter (who kick it off Aug. 11 to tout a long-awaited new album), P.O.S., Babes in Toyland (with Bruise Violet!), Dave Simonett's Dead Man Winter, locally based Congolese guitar wiz and front-porch folk mainstays the Roe Family Singers.

Tickets to all the tapings are available for free -- but obviously in a limited quantity -- through an online RSVP system. Sort of the Twin Cities' answer to "Austin City Limits" (but more creative from episode to episode), the show is moving back into the Twin Cities Public Television headquarters in downtown St. Paul after a major remodel forced the crew to shoot outside the studio last season.

Here's the confirmed schedule. One more taping will be announced for March.

Here's one of the show's best episodes from last season.