The Anti-Diva: Though still not regarded as a music mecca, Indianapolis is spawning more and more acts that combine artistic boldness with commercial viability. Take Mab Lab, the well-regarded trip-hop-jazz-funk combo that ended its five-year, five-album run last fall. Or Blueprintmusic, an acoustic quintet now working on its third collection of progressive folk. Or the Undefeatable Beats, a sprawling music and dance collective that constructs hip-hop and soul jams on a bed of traditional African drum patterns.