The amazing german Arte Quartett uses to play contemporary composers as well to compose new pieces and play jazz, improvised music.
Founded in 1995 by the saxophonists Beat Hofstetter, Sascha Armbruster, Andrea Formenti and Beat Kappeler, they have commissioned many works, often working collaboratively with a composer in developing a composition. The quartet has also arranged and composed original music which they often present at concerts with a thematic focus.
A brilliant band!
You can listen the resplended "Tread on the Trail" (version for 12 saxophones), a 1964/65 composition by Terry Riley from the album "Assassin Reverie" HERE
& also the "Chant des morts", using electronics and special water effects.