The first movement (Introduction - Choral) is in C minor and is made up of harmonized choral phrases that are first played in block chords on the great and pedals, and then repeated, piano, on the Swell.
The opening movement of a musical piece, titled "Introduction - Choral," is written in C minor and uses harmonized choral phrases that are first played with full sound on the grand and pedals, then repeated softly on the Swell piano.