Three ensembles from Southern Adventist University -- the Wind Symphony, Jazz Ensemble and Ringtones -- will pool their talents for a performance at 7:30 p.m. Saturday, Feb. 15, in Ackerman Auditorium on the Collegedale campus. "An American Tune" is the theme of this year's concert, which will feature Stephen Foster's "Slumber, My Darling," George Gershwin's Prelude No. 2 and Leonard Bernstein's "America" from "West Side Story." Admission is free. For more information call 423-236-2880.