It has been said that Haydn “excelled in every musical genre”. His Flute Quartets, written for the talented musicians who worked in his orchestra, are known for their keen melodic lines, expressive slow movements and finales full of joyful high spirits. Mozart’s String Quintet No. 4 is a piece full of extraordinary moments from the intense pathos and chromatic disquiet of its opening to the finale’s happy ending, where balance, light and gallant elegance dispel all trauma like turning on…