hymnody in the Western church introduced four-part vocal harmony as the norm, adopting major and minor keys, and came to be led by organ and choir. It shares many elements with classical music.

Today, except for choirs, more musically inclined congregations and a cappella congregations, hymns are typically sung in unison. In some cases complementary full settings for organ are also published, in others organists and other accompanists are expected to transcribe the four-part vocal score for their instrument of choice.