Emanuel Brook, renowed violinist and former concertmaster of the Dallas Symphony Orchestra, invites a group of friends and celebrated virtuosi from the DSO, including Barbara Sudweeks (viola), Chris Adkins (cello), Paul Garner (clarinet), Will Roberts (bassoon) Tom Lederer (bass) Gregory Hustis (french horn), and Carol Leone (piano) to perform music by Beethoven, including the popular but seldom-heart Septet in E-flat Major, op. 20.