Where Psalm 151 was intended for use after the first reading, Alleluias and Gospel Acclamations is intended for use before the Gospel reading. These are the Alleluias (during Lent and Passiontide, Gospel Acclamations) from the Roman Missal, in both English and Latin.
The settings are grouped seasonally, so that the people in the congregation may more easily sing them. Alleluias (and Gospel Acclamations) for major feasts within the Proper of Saints are grouped within the season that they would normally fall. In the case of Ordinary Time, they are grouped within the weeks that would normally fall in that calendar year (something that would have been much more difficult had we still be using Time after Epiphany and Time after Pentecost).
As for the music: much of the music is based on chants for given times of the year. In fact, only two of the Alleluias are completely original. In some cases, even the versicles are based on the chant that matches that of which the Alleluia is based. In others, Psalm Tones are utilized.
While there are some triple alleluias (the most commonly used in vernacular liturgies), a good chunk are double alleluias. I decided against the quadruple alleluia and other ghastly monstrosities such as the six-fold Alleluia, ten-fold Alleluia, repeat-at-every-measure Alleluia, or add-unnecessary-text-to-the-response Alleluia. Except for Lent and Passiontide, "Alleluia" is all you need, and it is this composer's opinion that three is enough.
You can figure out which Alleluia/Gospel Acclamation to use in the same way you would figure out which Responsorial Psalm to use: by the Liturgical Calendar links on the sidebar: the Complete three-year cycle, and for each of the three current years (which uses dates) - 2015, 2016, and 2017.
Here are the Alleluias, grouped by "season" - there are 13 in total. Enjoy!
Alleluia "Conditor Alme Siderum" (Advent, includes Immaculate Conception)
Alleluia "Divinum Mysterium" (Christmas)
Gospel Acclamation "Vexilla Regis" (uses the English response Glory and praise to you, Lord Jesus Christ and the Latin response Gloria et laus tibi, Christe in Latin) (Lent and Passiontide, includes St. Joseph and Annunciation)
Alleluia "O Filii et Filiae" (Easter Vigil)
Alleluia "O Filii et Filiae" (Easter Season, includes Annunciation for Paschaltide)
Alleluia "Pange Lingua" (Solemnities after Pentecost, includes the fixed date solemnities of St. John the Baptist and SS. Peter and Paul)
Alleluia for Ordinary Time I (completely original) (Sundays 2-6, includes Presentation of the Lord)
Alleluia "Adoremus in Aeternum" (Sundays 7-12)
Alleluia Providentiae (excerpted from my outdated Providence Mass) (Sundays 13-17)
Alleluia "Salve Regina" (Sundays 18-22, includes Transfiguration and Assumption)
Alleluia for Ordinary Time V (completely original) (Sundays 23-26, includes the Solemnity of the Exaltation of the Holy Cross)
Alleluia "Lux Aeterna" (Sundays 27-31, includes All Saints and All Souls)
Alleluia "Christus Vincit" (based on my 1999 Christus Vincit setting) (Sunday 32-Christ the King, includes Dedication of the Lateran Basilica and Thanksgiving Day)
Brian Michael Page
July 22, 2015