Dissonance Quartet, byname of String Quartet No. 19 in C Major, K 465, string quartet (a type of chamber music for two violins, viola, and cello) in four movements by Wolfgang Amadeus Mozart. It was completed on January 14, 1785, and it was noted especially for its divergence—especially in the slow introduction—from the then-standard rules of harmony.
The Dissonance Quartet is the last of a set of six string quartets—the others are KV 387, 421, 428, 458, and 464—that were dedicated to the Austrian composer Joseph Haydn and inspired by Haydn’s Op. 33, itself a set of six string quartets. Taken together, Mozart’s six are known as the Haydn Quartets (written 1782–85).
Although legends persist regarding Mozart’s rivalries with other composers, he established a friendship with Haydn that was untainted by envy and characterized by mutual admiration. Haydn asserted to Mozart’s father:
“I tell you, before God and as an honest man, that your son is the greatest composer known to me, either in person or by name. He has taste, and, what is more, a most thorough knowledge of composition.”
Here is this wonderful for your enjoyment:
