Violin Sonata in B-flat Major, No. 26, K. 378
Sonata Violin and Piano
In brief

The work has a bright, graceful character typical of the galant vein, alternating singable motifs with contrasting episodes where violin and piano engage in clear, elegant dialogue. Technically you'll face, in particular, Phrasing (2.5/5), which requires shaping each small phrase through fine coordination of bow speed and left-hand articulation so the line sings without force, and Position Changes (2.5/5), which demand quick, precise left-hand shifts to reach higher notes cleanly and without glitches. It is a chamber sonata typical of Mozart, part of his substantial output for violin and piano and representative of the Classical style rather than late-period experimentation. I do not give a reference interpretation here out of caution.

Formation

Violin and piano · 2 performers

Required forces
Violin 1 performers
Piano 1 performers
Playable parts
Violin Piano
MusicCoach difficulty
60/100
Intermediate
Likely range : 48–72/100
Confidence : 36% · to confirm
BeginnerIntermediateAdvancedVirtuoso
Exam grade
About grade 6 to 7

Estimated from our difficulty score, not taken from an exam syllabus. Checked against 333 works on the ABRSM syllabus: the exact grade is right 7 times out of 10, and within one grade 99 times out of 100.

Difficulty estimate by MusicCoach on a scale of 1 to 100.

Where this work sits
050100

Most works cluster between 45 and 65: a small score gap often marks a real step. The highlighted bar shows this work among those for the same instrument.

The MusicCoach difficulty measures a work's overall demands (technique, reading, stamina) on a shared 0-100 scale, consolidated from editorial and pedagogical reference points (Henle, exam syllabuses, curation) and our own analyses. It measures neither musical value nor the practice time YOU will need: two musicians of the same level can experience the same work very differently depending on their strengths (hands used to octaves, quick sight-reading…). The confidence reflects how many reference points sit behind the score and how well they agree — a lightly documented score is flagged “to validate”. For a truly personal bearing, the diagnostic and your space compare each work to YOUR estimated level, which the score alone cannot do.

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Relative difficulty
79%
Among Mozart
72%
Era
46%
Genre
Estimated skills
Technique
Position changes
1
Technique
Intonation
1
Technique
Bow legato
1
Interpretation
Dynamics
1
Interpretation
Phrasing
1
Rhythm
Complex bowing rhythm
1
Style
Classical style
1
Tone
Vibrato
1
What to play next?

Each suggestion combines difficulty gap, risk, confidence and skill overlap. The first two cards in each column are the most useful pedagogically.

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