If you spend as much time doing hymnological things as I do you have undoubtedly run into two of the sites that will give running loops of music examples. For any hymntune you search and which these sites find you may immediately hear a digital playing of a 4-part (SATB, hymnbook-style) version.
One is The Oremus Hymnal at http://www.oremus.org/hymnal/ which is being migrated to WIKI format at http://hymnal.oremus.org/hwiki/index.php/Main_Page.
The other site is Cyber Hymnal (now known as NetHymnal) at http://www.cyberhymnal.org/.
These two sites are very helpful with biographical information on authors and composers. There was the "annoying" part of the constantly looping hymntune playback at less-than-human expression and often with full tremulants.
If you are looking for source materials you will probably find them here.