[tellw]

I've learned to sing the entire office that can be sung (opening responses, psalms, lessons, canticles and collects) from a plainchant psalter. There's an excellent one out using the 1928 BCP called the St. Dustan's Psalter. See http://www.andrewespress.com/dunstan.html

It includes some gems like a chanted version of the Athanasian Creed.

[RonF]

You might want to check out the Hymnals. There are both chant and song settings for the Morning, Evening, and Eucharistic offices. Looking in the 1982 Hymnal I didn't find the Athanasian Creed, but I did find the Nicene Creed in about 3 settings. This is all in the front of the Hymnal; the numbers begin with "S". I have a 1940 Hymnal at Church that I'll look in (it was my mother's from when she sang in the Choir) on Sunday; I'm quite sure there are service settings in there as well (and even a 2-page guide to chanting that I copied out for our choirmaster to give to the choir).