It is nicknamed a joke due to its surprising pauses and false ending.
It is referred to as the joke because it concludes with the silliest joke possible. The last movement is a rondo, a musical style in which the main subject alternates with opposing melodies, typically in a different key.
This one's primary themes are transient and joyous. It returns as predicted after the last contrast, but this time there are uneasy pauses that give the impression that the actors are unsure of when they have reached the finish.
The final gap lengthens nervously before ending with a quiet murmur that is more of an inquiry than an answer. False endings are incorporated in the piece's final movement, leaving the listener unsure of the composition's true conclusion.
Therefore, the second string quartet of Hayden's op. 33 collection is nicknamed the joke due to a surprise element and false ending.
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