Euouae in the context of Neume

An antiphon (Greek ἀντίφωνον, ἀντί "opposite" and φωνή "voice") is a short chant in Christian ritual, sung as a refrain. The texts of antiphons are usually taken from the Psalms or Scripture, but may also be freely composed. Their form was favored by St. Ambrose and they feature prominently in Ambrosian chant, but they are used widely in Gregorian chant as well. They may be used during Mass, for the Introit, the Offertory or the Communion. They may also be used in the Liturgy of the Hours, typically for Lauds or Vespers.

They should not be confused with Marian antiphons or processional antiphons.

The Gloria Patri, also known in English as the Glory Be to the Father or, colloquially, the Glory Be, is a doxology, a short hymn of praise to God in various Christian liturgies. It is also referred to as the Minor Doxology (Doxologia Minor) or Lesser Doxology, to distinguish it from the Greater Doxology, the Gloria in Excelsis Deo.

The earliest Christian doxologies are addressed to the Father "through" (διὰ) the Son, or to the Father and the Holy Spirit with (μετά) the Son, or to the Son with (σύν) the Father and the Holy Spirit.