We hope that everyone had a blessed Christmas and happy new year!  Just wanted to share an article originally published at New Liturgical Movement and now found on Corpus Christi Watershed about why the texts of the Gradual, which are used in the Laudate Dominum Communion Antiphons, are best suited for singing at Mass, as opposed to those found in the Missal.  Andy has explained that in the past, but this article provides greater detail and historical basis.
In the last week, Andrew has received questions from two different people as to why Laudate Dominum Communion Antiphons do not always line up with what you might find in your parish's missalette.  The short answer is:

Most missalettes use communion antiphons from the Missal (Sacramentary); Laudate Dominum Communion Antiphon settings are from the Graduale Romanum (Gradual). The antiphons are not always the same. Both the Missal and Gradual antiphons are licit for use at Mass.

To read the long answer, go to Using Communion Antiphons, and see the section labeled "Why are these communion antiphons different from the ones in my parish's missalette?"
Andrew's blog post at Corpus Christi Watershed is now available.  We encourage you to check it out!  This post provides greater insight into why Andrew began composing the antiphons and how they can be used in conjunction with chant antiphons from the Graduale Romanum