UTSIDE OF EASTERTIDE, the Alleluia is easy enough to sing. The “Alleluia” is sung, up until the asterisk. Then, the complete Alleluia is sung. The verse follows, and the “Alleluia” is repeated in its entirety.
This method creates something like this:
— ALLELUIA (1/2)
— ALLELUIA (complete)
— VERSE
— ALLELUIA (complete)
By the way, this same method is also used for the very first week of Easter (confusing, no?).
* * However, during Eastertide, the method changes, since there’s now a Lesser Alleluia and Greater Alleluia. During Eastertide, here is the method for the 1st Alleluia (sometimes called the “Lesser Alleluia”):
LESSER ALLELUIA: Alleluia is sung up until the asterisk. Then, the entire Alleluia is repeated. Then the verse is sung.
This method creates something like this:
— ALLELUIA (1/2)
— ALLELUIA (complete)
— VERSE
And, for the 2nd Alleluia (sometimes called the “Greater Alleluia”):
GREATER ALLELUIA: Alleluia is sung all the way through. The verse is sung. The Alleluia is sung all the way through.
This method creates something like this:
— ALLELUIA (complete)
— VERSE
— ALLELUIA (complete)
If you don’t think my explanation was clear, you can read Dom Johner or the Vatican Preface. However, some people get confused by these, as the wording is not totally clear.
Incidentally, after the Second Vatican Council, the method of singing the Alleluia was changed somewhat, but it is still allowed to use the traditional method.