People were supposed to sing these Psalms using only 13 different melodies (maybe our upcoming Synod should consider this, seeing that they have to decide what to do all the “difficult genevan tunes”).
In North America, the first war was about psalm singing vs hymn singing, and the Bay Psalter (psalms-only) was at the center of it.
Here is more background: http://www.christianitytoday.com/ct/2012/december-web-only/bay-psalm-book.html?paging=off
Interesting that Psalm 137 is quoted as a reason why Psalm singing was not appreciated anymore, and hence disappeared. I guess that the same argument can be used today about Psalm137 in our own Book of Praise… But hopefully we don’t lose the war…