Keller Williams will perform in Skowhegan at the Opera House March 21. SKOWHEGAN — Keller Williams returns to his solo roots for a show on March 21, in Skowhegan at the Skowhegan Opera House, 225 Water Street, beginning at 8 p.m.

Keller has been called guitars' mad-scientist, a oneman band for the new millennium and dozens of other clever sobriquets dreamed up by fans and music journalists trying to get a handle on his uplifting and ever-shifting style of music. Williams is considered by some, but not by himself, to be a master of the acoustic guitar, known for his ability to solo over layers of spontaneously created loops. He is a generous performer who plays down-to-earth acoustic music that defies any effort to find a convenient pigeonhole. If pressed for a definition, Williams, as adept with language as he is with a guitar pick, calls it solo, acoustic jazzfunk reggae technograss —or simply, solo acoustic dance music.

Tickets, $25 in advance and $30 at the doors, are available now at all Bull Moose Music locations, and online at www.kellerwilliams.net. Tickets will also be available soon at the Skowhegan Chamber of Commerce and at a location yet to be determined in Farmington.