Buxtehude took the melody and words from the evening hymn Christ, der du bist der helle Tag. The words are embellished with coloratures and a change of meter enhances the work’s charme. This composition goes beyond the bounds of a straightforward chorale cantata through its use of concertante elements, which also applies the voice parts. The title of this work, on a copy made by Gustav Düben, refers to the accompanying violin parts in the words “con due vel piu violini”. This may indicate that e...