Tchaikovsky’s Symphony No. 5 is the centerpiece of tonight’s Cleveland Orchestra concert at Severance Hall. But that’s not the only piece you’ll hear at the concert. Organist Paul Jacobs has been invited to appear as a soloist and will give the highly anticipated American premiere of Bernd Richard Deutsch’s Okeanos, Concerto for organ and orchestra. Youngstown State University's Caroline Oltmanns will lead a discussion with Jacobs an hour before the concert. Tonight’s performance begins at 7:30, and concerts are scheduled through Sunday. Check the Cleveland Orchestra website for times and ticket prices. (Niesel)