For 10 points, name this composer of Music for Strings, Percussion, and Celesta and Concerto for Orchestra.
A section marked "calmo" in one of this man's works has a chromatic timpani line with 10 distinct pitches. This composer used a form with slow lassú and fast friss sections for his two rhapsodies for violin and piano; he also used that form, the verbunkos, in his Contrasts. Voices in the fugal first movement of one of his works progress in opposite directions from A through the circle of fifths. That piece's third movement exemplifies his (*) "night music" style. This composer's works in arch form include the fourth and fifth of his six string quartets, which use his namesake snap pizzicato. This composer's didactic collection Mikrokosmos includes pieces in Bulgarian rhythm, and he used Hungarian and Romanian themes in pieces like Allegro Barbaro. For 10 points, name this composer of Music for Strings, Percussion, and Celesta and Concerto for Orchestra.
A section marked "calmo" in one of this man's works has a chromatic timpani line with 10 distinct pitches.
Béla (Viktor János) Bartók