The Winnetka Music club is pre senting the following artists for the 1928-9 season: Claudia Muzio, beloved soprano of three continents, and prima donna of the Chicago Civic Opera company. Vladimir Horowitz, the young Rus sian pianist, whom the club is most fortunate to secure. One of the critics says of his performance of the Rachmaninoff piano concerto, number II,in D minor, βThe audience was transformed into a milling, enthusias tic mob after Horowitz had finished his electric, vital performance and not less demonstrative were the mem bers of the orchestra in showing their approval.β Albert Spaulding, famous violinist, is being repeated. He is so well known on our north shore that nothing more need be said. Andres Segovia, who is new to the Middle West. He is the great Span ish guitarist, the sensation of the past musical season, twenty-five engage ments in five weeks, and six sold-out New York recitals. He stands in re lation to the instrument of his choice as Casals does to the violin-cello, or Kreisler to the violin, John Charles Thomas, eminent bari tone, who will complete the course. In Europe Mr. Thomas is the leading bari tone of the Royal Opera at Brus sels, while in the U. S. his recitals have gained him a wide vogue. He has taken a leave of absence from his engagement in Brussels, and will devote his entire season, 1928-9, to the concert stage.