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Piano Sonata in B-flat major
Piano Sonata in B-flat major
No. 13
by W. A. Mozart
	The young composer, a 1777 copy of a lost painting
Key	B-flat major
Catalogue	K. 333 / 315c
Style	Classical period
Composed	1783
Published	1784
Movements	Three (Allegro, Andante cantabile, Allegretto grazioso)

The Piano Sonata No. 13 in B-flat major, K. 333 (315c), also known as the "Linz Sonata", was composed by Wolfgang Amadeus Mozart in Linz at the end of 1783.

The autograph manuscript of the sonata is preserved in the Berlin State Library.

Dating

There is no doubt the sonata was first published on 21 April 1784 in Vienna by Christoph Torricella (along with K. 284 and K. 454, as op. 7). The actual date of composition, however, has proven more difficult to determine. Because the manuscript is not written on the type of music paper Mozart is known to have used in Vienna, scholars believed the piece was composed before Mozart moved there. Thus Köchel, in the first edition of his Mozart catalog (1862), gave the hypothetical date 1779, later clarified by Georges de Saint-Foix (1936) to "Salzburg, beginning of January–March 1779." However, Alfred Einstein, in the third edition of the Köchel catalog (1937), said it was composed in "late summer 1778 in Paris." This date was maintained even until the sixth edition of the Köchel catalog (1964).

More recently, this date has been invalidated by the findings of Wolfgang Plath and Alan Tyson. On the basis of Mozart's script, Plath assigns the piece to the time around 1783/84, "likely not long before the appearance of the first print." Furthermore, Tyson convincingly demonstrates through paper tests that the work was composed at the end of 1783, likely in November, around the same time as the "Linz Symphony", K. 425, when the Mozart couple made a stopover in Linz on their way back to Vienna from Salzburg. This new dating also fits stylistic criteria.^[1]

Movements

The work is a sonata in three movements:

Allegro
Andante cantabile
Allegretto grazioso

A typical performance takes about 23 minutes.

I. Allegro

performed by Bernd Krueger.

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The first movement is in sonata form and is generally lively in character. It begins in the key of B♭ major and eventually cadences on the dominant, F major. The development section starts in F major and modulates through several keys before recapitulating on the tonic.

II. Andante cantabile

performed by Bernd Krueger.

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The second movement is marked Andante cantabile and is also in sonata form, but in the subdominant key of E♭ major. The movement opens with thirds in the right hand progressing to the more lyrical theme of the movement accompanied by flowing broken triads in the left hand. It soon modulates to B♭ major for a minuet-like section. After this, the movement begins to modulate back to E♭ major for a repeat of the exposition. However, after the first repeat, just as it seems to settle again in E♭ major, the development part begins in F minor. Then, it modulates to C minor, to A♭ major, to F minor, then D♭ minor, then A♭ minor, and finally back to the tonic, E♭ major at which point the recapitulation occurs. Throughout the second movement, chromaticism is present which occasionally evokes a slight sense of dissonance.

III. Allegretto grazioso

performed by Bernd Krueger.

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The third movement, a sonata-rondo, shows much similarity to the first by chord pattern and by music phrases. The first part starts simply but playfully. The theme is repeated but with the broken chords accompanying the melody. The mood slowly softens but a difficult melody is quickly established. It builds up and ends at a climax.

In the second part the first part is repeated until its course changes to a minor key. It then plays two phrases which will be repeated in different keys. The third part comes in quickly and unexpectedly. It comes to a section where the major and minor keys switch every few bars. It slowly comes back to the major key where it repeats the opening theme for the second time. It continues with phrases adapted from the first movement. Then comes a series of arpeggios which lead to a short pause preceding the final repeat of the first theme with accompaniment variations, ending the piece.

References in pop culture

The first movement was performed at the Royal Albert Hall in 1969 by Frank Zappa's The Mothers of Invention, accompanied by a "grotesque parody of the art of ballet dancing" performed by the band members. Though not as a direct result of this piece, Zappa was later banned from performing at this venue.

The third movement of this piece is often used for hold music while calling a customer support line.

References

^ This section draws its information from the Preface to the Neue Mozart-Ausgabe IX:25/2, the volume containing the critical edition of this sonata. For more information, see Alan Tyson, "The Date of Mozart's Piano Sonata in B flat, KV 333/315c: the 'Linz Sonata'?" in Musik – Edition – Interpretation: Gedenkschrift Günther Henle, edited by Martin Bente (Munich, 1980): 447-454.