Here's something very cool. In January I posted a Pesach post, featuring a 17th century Latin Haggadah (link). The translator, Johannes Rittangel, happened to have included the musical notation for two Passover night hymns according to the tune which they were sung among Western European Jews in his time. I jokingly, but hopefully, asked talented readers if they would care to play those tunes on a harpsichord and upload it so we could hear it. One polymathic reader did just that (link; although I suspect that we ought to call that "harpsichord" style).
Paul Shaviv, principal of TanenbaumCHAT in Toronto was so intrigued by those tunes that he asked the school's music directors if they could transcribe the music in modern notation and arrange it for the school's choir to perform, and they did. Here it is!
As was already noted in the comments, Adir Hu in particular, while certainly sounding antique, is recognizable as the common tune still sung by Ashkenazim. The other one, Ki Lo Na'eh, sounds very medieval and both of them sound great. One teacher at the school said "It is not exactly what I would describe as jaunty . . . it is more of a dirge than a toe-tapper" which I cannot disagree with - as quoted in the National Post, which did a nice story about it here.
I should repost the music as it appeared in Rittangel's Haggadah, so here it is:
I should also mention that I asked Paul if he could get his choir to give life to Christian Gerson's notation for Talmudic chant circa 1600 :
Gerson, a convert, printed this sample. Note that it is set to be to a tune which rhymes "herring" and "pfenning." I'm not sure if Gerson's point was that this traditional chant for reading the Talmud was to this folk tune, or if he was mocking the Talmud and setting it to trivial words. Alternatively, they may actually be a translation of a few lines in the Talmud - of course trivial seeming ones - but I'm not sure.
In any case, whether or not I ever got to hear a good version of Christian Gerson's rendition of The Lady Gets a Herring for Three Pfennings to a tune probably used by the http://en.wikipedia.org/wiki/Samuel_Eidels">Maharsha, I couldn't be happier than with what Paul did with the Pesach songs. Many thanks to him for thinking of it, and for his talented students and teachers for making it happen.
 I'm not sure if it's a good idea to give a hat tip to the individual who supplied me with this image, so let me just say thank you.