Who are the singers?

"Who protects you from the Amyr, the singers, the Sithe?"

Might not be an exact quote but definitely close enough. For those who don't recognize it, it's from Haliax when Kvothe sees the Chandrian after they kill his troupe. He is talking to the other Chandrian.

I have thought long and hard about this. "singers" is not capitalized as "the Sithe" and "the Amyr" are. They are specific groups of people. The "singers" don't appear to be. This leads me to believe a certain theory.

Kvothe not only has a clear knack for naming (practically named Cinder when guessing Master Ash's name before deciding to just call him Master Ash, I don't remember what he said but it was several names similar to "Ferule/Ferula") but has a knack for learning things quickly and music. Does music, particulary singing, have an affect on the Chandrian? Can someone sing names in some order or context that makes naming them more powerful/hazardous?

Felurian speaks in rhymes. This could be considered singing. Are the Fae "the singers"? Are they afraid of them as well as the Amyr? The Sithe have been represented in the Fae realm, so I assume they are Fae.

Anyway, WHO THE SHIT ARE THE SINGERS?! Singers in general? Tell me your thoughts, please.