The other day, I was sent the link to the Aberdeen Free Church of Scotland (Continuing) website. The Aberdeen FCC site has midi files of *all* the psalm tunes from the psalter we use, which is the 1992 version of the split-leaf psalter published by the Free Church of Scotland.
Aberdeen Free Church Continuing--Online Media
I was very pleased to receive this link, as I've had trouble finding audio files of psalm tunes in the past. I was also pleased to discover, on this site, a few recordings of the psalms being sung. You'll find three recordings at the very bottom of the page linked above; and click on the "Psalmody CDs" link in the sidebar to find two more recordings, samples from CDs that this church has produced.
The recordings from the Aberdeen FCC site are excerpts from Psalms 36, 68, 85, 112, and 136. I've added them to this post, which is an index of all the psalm recordings I have been able to find online.
Also, you might have noticed that I've added a "psalm singing" page to my blog (see the tabs at the top). There's nothing new at this point--just a player with all of the psalms that we have recorded here at our monthly psalm singings, plus a link to the post with the index of psalm recordings; but I thought it might be useful to have that info quickly accessible at the top of the page for psalm-singing fans. :)