Do you know of any good sources for a capella, barbershop, or otherwise voice-focused musc, NOT in the English language?
I like the sound of the human voice, in particular when there are multiple or many singers harmonizing together. But when I'm trying to read (or e.g. browse the web), language with words I can recognize is very distracting and makes it hard for me to focus on the words I"m reading.
The only thing I really know of that works for this is gregorian chants, but I'd like to find some different stuff as well.

As a side note: I'm not really looking for stuff with soloists/single performers, at least not if they're just singing lyrics.