The Orchestre de la Suisse Romande (OSR; literal translation, "Orchestra of French-speaking Switzerland") is a Swiss symphony orchestra, based in Geneva at the Victoria Hall. In addition to symphony concerts, the OSR performs as the opera orchestra in productions at the Grand Théâtre de Genève. Ernest Ansermet founded the OSR in 1918, with a contingent of 48 players and a season of six months' duration. Besides Swiss musicians, the OSR players initially came from other countries, including Austria, France, Germany and Italy. Ansermet gradually increased the percentage of Swiss musicians in the orchestra, attaining 80% Swiss personnel by 1946.[1] Ansermet remained the music director of the OSR for 49 years, from 1918 to 1967. A Swiss radio orchestra based in Lausanne was merged into the OSR in 1938. Subsequently, the OSR began to broadcast radio concerts regularly on Swiss radio.[1] The orchestra had a long-standing contract for recordings with Decca Records, dating from the tenure of Ansermet, and made over 300 recordings for Decca, starting in 1947 with Debussy's La mer.[2] The OSR premiered many works of the Swiss composers Arthur Honegger and Frank Martin. During the directorship of Armin Jordan (1985–1997), the OSR continued to make recordings on the Erato label.[3] Since 2005, the artistic director and music director of the OSR has been Marek Janowski. He has conducted the OSR in recordings for the Pentatone label.[4][5] In September 2008, his initial 5-year contract was extended to 2015.[6] However, in January 2010, in a change to the September 2008 contract extension, Janowski and the OSR mutually agreed on the scheduled conclusion of his directorship of the OSR after the 2011-2012 season.[7] Following the announcement of Janowski's scheduled 2012 departure, attempts to secure Bertrand de Billy[8] and Kazuki Yamada[9] as the OSR's next artistic leader did not come to fruition. However, in September 2010, the OSR named Neeme Järvi as its ninth artistic and musical director, and in parallel, Yamada as principal guest conductor, with both appointments effective as of 2012, with initial contracts of 3 years for both conductors.[10] At Järvi's contract signing in October 2010, the orchestra indicated that Järvi is scheduled to take over the OSR artistic directorship in January 2011.[11]