Rosé did other things as well as playing with the orchestra. He gave violin lessons to talented pupils. He like to play string quartets and he got together with three other players to make up the Rosé Quartet. They were very good and for more than half a century people said they were the best string quartet in Europe. Arnold’s brother Eduard was the cellist in the quartet. They played works by lots of composers, especially Haydn, Mozart and Ludwig van Beethoven. Rosé knew the composer Johannes Brahms and they played some of Brahms’s compositions when they had only just been written, e.g. the clarinet quintet (for clarinet and string quartet). The Rosé Quartet also knew the composer Schoenberg and helped him to get well known by playing his music.