Twenty-Two Lyrical Etudes based on Gregorian Chant Melodies. These beautiful and melodious pieces are a unique contribution to the literature for brass players. Lyrical, flowing music is animport ant component of a brass player's daily diet. This collection adds a unique twist to the available material. Jon also gives sources and an overview of the chant modes. Pitched a ninth below thetr umpet book, these can be played in octaves with a trumpeter using a Bb trumpet. important component of a brass player's daily diet. This collection adds a unique twist to the available material. Jon also gives sources and an overview of the chant modes. Pitched a ninth below the trumpet book,these can be played in octaves with a trumpeter using a Bb trumpet.