Being a mostly-unaccompanied choir, we prefer to use just intonation rather than the well-tempered tuning normally used by piano tuners. As you can see from the chart below, some of the differences are very subtle, and some quite substantial, with the largest ones being 16% higher or lower than the well-tempered tuning we hear on the piano.
We’ll add more information to this page as we go.
Here’s a video the explains some of the issue. It’s not my favorite video, but it’s useful. Perhaps I’ll find another soon.