Choral Public Domain Library

I am looking for a cappella choral scores with SSA or SSAA arrangements. Is it possible to narrow down a search to these parameters please?

Yes. You can use the Multi-Category Search feature on the left side of the CPDL site. It allows you to select restrictions for search results which include a cappella and specific voicing such as SSA and all sorts of other search categories. Please post here if you encounter any issues in trying it.

Brilliant - thank you!