Music Director Osmo Vänskä conducts the conclusion of the first movement of Beethoven's Fourth Symphony, in this clip from a performance recorded on Friday, March 19, 2021.

The symphony’s originality is evident from its first instant: the key signature says B-flat major, but the symphony opens in B-flat minor. The introduction keeps us in a tonal fog, but those mists blow away at the Allegro vivace, as heard here. Huge chords lash out, and when the main theme leaps out brightly, we recognize it as a sped-up version of the slow introduction.