Excerpt from Die Pennsylvanische Choral Harmonie: Enthaltend Die Vornehmsten Kirchen-Melodien, Versehen Mit Deutschem Und Englischem d104e; The Pennsylvania Choral Harmony, Containing the Principal Church Melodies Every piece of music is written in a particular Key, to which all others, introduced by the modulation, must be related. The Bass of a recular composition always ends on the Key-note, and the piece is said to be composed in the Key...