Für Elise (theme)
Beethoven's Für Elise opens with one of the most recognisable ideas in music — and it's a perfect little study in a minor key and its leading tone. First position, A minor, in 3/8 (a quick, light triple pulse).
The oscillation — and the leading tone
The famous opening rocks between E and D♯. That D♯ is the leading tone of the dominant (E is ^5 of A minor; D♯ is a half step below it) — a chromatic lean that gives the tune its restless, questioning tug. Then the line falls B D C down to A, home.
The answering figures — two rising arpeggios
The phrase answers itself with two rising arpeggios: C–E–A (the A minor chord), landing on B; then E–G♯–B (an E major chord — there's the raised leading tone G♯), landing on C.
The whole statement — playthrough
The usual mistake
Playing D♯ and G♯ flat — as plain D and G — out of "it's a minor key" habit. Both are raised leading tones doing a specific job: D♯ leans toward E, G♯ leans toward A. Place them high, up against the next finger, and let your ear hear them pull. The other mistake: heavy, romantic playing. Für Elise is delicate — small bows, light fingers.