There aren't too many classical concerts where you find a member of the orchestra's woodwind section sitting a couple of seats away from you, playing his instrument.
That is what happened on Friday evening at the Ordway Center for the Performing Arts, as the St. Paul Chamber Orchestra opened its 60th anniversary season with a performance of the American composer Terry Riley's "In C."
"In C" is a totemic piece, credited with launching the musical movement we now know as Minimalism, which uses repetitive patterns of small melodic cells to create broader sonic canvasses.
The piece leaves a lot of decisions to the performers, such as when to stop and start each of the 53 modules Riley provides as raw materials to make the music happen.
The SPCO took that freedom and walked with it, placing some of its members at the rear of the auditorium and on the balconies and having them move among the audience as they played.
The effect was to heighten appreciation of how intricately intertwined the strands of Riley's do-it-yourself masterpiece became as the piece developed, and how distinctively individual voices contributed within its apparently homogenized textures.
Half a century after it was written, "In C" emerged as a strangely democratic message in these fractured times, a metaphor for how a multitude of contending voices can still combine in a teeming unity of common purpose.
Another American work, Samuel Barber's "Knoxville: Summer of 1915," came after intermission. Where "In C" tilts with unbowed optimism toward a brighter future, "Knoxville" clings achingly to a past that somehow seemed better but will never come again.