Eine kleine Nachtmusik

Music

The serenade is written for an ensemble of two violins, viola, cello, and double bass, but it is often performed by string orchestras.

The work has four movements:

1. Allegro, ⁴
   ₄
2. Romance: Andante, ²
   ₂ in C major
3. Menuetto: Allegretto, ³
   ₄ with trio in D major
4. Rondo: Allegro, ²
   ₄

I. Allegro

This first movement is in sonata-allegro form. It opens with a theme of an ascending Mannheim rocket. The second theme is more graceful and in D major, the dominant key of G major. The exposition closes in D major and is repeated. The development section begins in D major and touches on D minor and C major before the work returns to G major for the recapitulation.

II. Romance: Andante

The second movement, with the tempo marked Andante, is a Romance in C major, the subdominant key of G major, and was originally the third movement out of five. It is in rondo form, taking the shape A–B–A–C–A plus a final coda. The keys of the sections are C major for A and B, C minor for C. The middle appearance of A is truncated, consisting of only the first half of the theme. Daniel Heartz describes the movement as evoking a gavotte rhythm: each of its sections begins in the middle of the measure, with a double upbeat.

III. Menuetto: Allegretto

The third movement, marked Allegretto, is a minuet and trio, both in ³
₄ time. The minuet is in the home key of G major; the contrasting trio is in D major, the dominant key of G major. As is normal in this form, the minuet is played again da capo following the trio.

IV. Rondo: Allegro

The fourth and last movement is in lively tempo, marked Allegro; the key is again G major, and the movement is written in sonata form. Mozart specifies repeats not just for the exposition section but also for the following development and recapitulation sections. The recapitulation's first theme is unusual because only its last two bars return, and in the parallel minor. A coda ends the piece.

Possible extra movement

In the catalogue entry mentioned above, Mozart listed the work as having five movements ("Allegro – Minuet and Trio – Romance – Minuet and Trio – Finale."). The second movement in his listing — a minuet and trio — has long been thought lost, and musicologist Alfred Einstein does not know who removed it. In his 1984 recording, Christopher Hogwood used a minuet of Thomas Attwood (found in his sketchbooks used while he took lessons from Mozart) and an additional newly composed trio to substitute the missing movement. Einstein suggested, however, that a minuet in the Piano Sonata in B♭ major, K. 498a, is the missing movement. K. 498a, which is credited to the composer August Eberhard Müller, incorporates significant amounts of Mozart's work in the form of reworkings of material from the piano concertos K. 450, K. 456, and K. 595, leading Einstein to suggest that the minuet in Müller's sonata might be an arrangement of the missing movement from Eine kleine Nachtmusik, however, the evidence for this is limited.

In 1971, this movement was incorporated into a recording of the work prepared by the musicologist and performer Thurston Dart. In 1989, the minuet and trio of K. 498a was again recorded as part of an arrangement of Eine kleine Nachtmusik made by Jonathan Del Mar for Nimbus Records.

Modern reception

Today, the serenade is widely performed and recorded. Britannica has referred to it as "among the most frequently performed and iconic of all classical compositions." Hildesheimer suggests that it is the most popular of all Mozart's works, writing: "even if we hear it on every street corner, its high quality is undisputed, an occasional piece from a light but happy pen." This piece has been featured in studies about the impact of music on weight gain in farmed fish, in which it produced greater weight gain than other music or white noise, and on wellbeing in humans. Study participants listening to the serenade rated hills as less steep than participants listening to the Adagietto from Mahler's fifth symphony.