The Iowa State Wind Ensemble’s Spring Concert this Sunday will be a little more emotional than usual for several members of the group and its directors.One of pieces the Ensemble will be performing will be in memory of the former director Joe Christensen, who died in 1998 after complications following a liver transplant. “Concerto for Alto Saxophone and Wind Ensemble” was written by acclaimed composer David Maslanka and was commissioned by the Big 12 Band Directors Association in memory of Christensen. Martin Province, assistant professor of music and associate director of bands at Iowa State, worked under Christensen for two years and will direct the piece. Michael Golemo, the director of bands and assistant professor of music, will be the featured saxophone soloist. Province said the Wind Ensemble will only perform two of the five movements in the piece, with the second being dedicated to Christensen. He said the second movement is “very prayerful.””It is going to be very emotional for me,” he added. Golemo said that he has been impressed with the students in the ensemble. He said their dedication to the group and every aspect of their performance has been tremendous.”It’s almost overwhelming at times,” he said. Mark Anderson, a senior in music, said Christensen demanded the best from his players, was enthusiastic and approachable about his music, and he cared about all of his players. He added that this Sunday’s performance will be “a really nice tribute to him.”Anderson also said that the performance will have excellent variety. Jeffrey Prater, professor of music, is having one of his compositions performed by the Wind Ensemble and will feature Lynn Zeigler, professor of music, on the organ. Elizabeth Hovey, a senior in music education, will be conducting “Outdoor Overture” by Aaron Copland. Province said that he is looking forward to a good performance by the ensemble on Sunday.”Knowing both the conductor [Golemo] and the ensemble, I’m sure it will be nothing less than stunning,” he said.The performance will begin at 3 p.m. in the Martha-Ellen Tye Recital Hall in Music Hall. The show is free of charge and open to the public.