The first movement of Beethoven’s Sonata No. 27, Op. 90, is a compact E minor movement built from sharply contrasting gestures. Short forceful chords answer softer phrases, and passages of quick running notes give way to sustained harmonies and pauses. The music develops these ideas through changes of register, accompaniment, and melodic voice before returning to the opening material and ending quietly.

Opening dialogue: A brief chord begins the movement, followed by a longer upper phrase and another detached response. Softer thirds change the tone almost immediately. A dolce melody then unfolds above held bass notes and a moving lower line. Later upper octaves and widely spaced lower harmonies create a broader texture, but rests and fermatas repeatedly interrupt the momentum. These pauses are part of the written exchange between the phrases.

Runs and contrasting melody: Pairs of chords rise through the keyboard before a forceful arrival releases a descending right-hand run. Different groups of quick notes appear within these flourishes, including triplets and larger tuplets. The left hand briefly passes beneath the sustained upper part. Repeated lower chords then drive a stronger passage, with longer upper notes and offbeat accents. A contrasting melody follows above continuous left-hand sixteenths whose broken patterns span wide intervals. The upper line moves slowly while the bass remains restless.

Middle section: Held notes and interrupted chord responses reduce the activity before a new passage begins with repeated inner eighth notes. Short melodic fragments move through changing harmonies above repeated lower intervals and chords. The texture later thins into alternating single notes and octaves. A quieter two-part exchange leads to right-hand arpeggios, while the left hand carries a more continuous tenor melody. This lower line remains prominent as the upper figures climb and the dynamics increase.

Return and quiet close: The rapid figures subside into shorter exchanges, and the opening chordal theme returns. Its softer melody, upper octaves, descending runs, and repeated-chord writing also reappear. The long upper line over wide lower sixteenths comes back before the music gradually becomes more sparse. Near the end, fragments of the opening idea alternate with rests and sustained harmonies. The final upper phrase settles into a soft E minor chord with a fermata.

Interesting fact: The opening instruction is written in German. This edition translates it as animation with feeling and expression throughout, emphasizing character as well as pace.