Something about the French horn compelled Felix Klieser to play it when he was barely 4  years old. The German musician, now 31, has gone on to study at the Hanover University of Music, Drama, and Media; release three studio albums; and perform in premier ensembles around the world, including with British conductor Sir Simon Rattle at the Berlin Philharmonic and with Sting on his world tour. Currently the artist-in-residence at the Bournemouth Symphony Orchestra, Klieser is preparing for a busy season that includes the world premiere of “Soundscape – Horn Concerto,” a work created for Klieser by Swedish composer Rolf Martinsson that will be performed at the Kongresshalle in Saarbrücken, Germany, next month.