The instruments in the orchestra for the Violin Concerto are : 2 flutes ( both doubling as piccolo ) , 2 oboes , ( one doubling as a cor anglais ) , alto saxophone ( doubling as a clarinet ) , 2 clarinets , bass clarinet , 2 bassoons , contrabassoon , 4 horns , 2 trumpets , 2 trombones , tuba , timpani , percussion , harp piano and strings . The concerto is scored for 2 flutes ( both doubling as piccolo ) , 2 oboes ( one doubling as a cor anglais ) , alto saxophone , 2 clarinets , bass clarinet , 2 bassoons , contrabassoon , 4 horns , 2 trumpets , 2 trombones , tuba , timpani , percussion , harp and strings .