A buddy of mine (Gareth Hearne) wrote this microtonal Sanctus in what's called "porcupine temperament", and I finally got around to making a recording of it:
Similarly to how western music has a circle of fifths, Porcupine Temperament has a circle of small major seconds (approximately 160 cents wide). It approximates many intervals of the harmonic series as well or better than standard western tuning, especially the 11th harmonic. (Kind of like how barbershop singers sing their minor sevenths or augmented sixths flat to be in tune with the 7th note in the harmonic series, porcupine has a "fourth"-ish thing that lines up with the 11th note in the harmonic series and it, I think, blends very nicely!)
If you have any questions on the theory I'd be happy to talk about it, thanks for listening =)