We don’t. And I’m not particularly musical either. But the kids like singing the hymns, so I did a search for a place to easily access the hymns in the breviary for our family to use at Evening Prayer, which we’ve been doing every night since I returned from Guatemala. Turns out that there is a mighty fine blog called Breviary Hymns, which features an index (alphabetical, by first line of the hymn) of every hymn. If you click on the hymn you want, you get a page with some details about the text, melody, tune, and setting, as well as (in most cases) one or two youtube videos with the hymn itself. My favorite videos are the ones without singing, and just the organ playing (i.e., religious karaoke).