Hush! This is a library!

I went to return CDs to the Joensuu main library and loan new ones. A "roots music" (blues, bluegrass, folk, whatnot) duo was performing there for an audience of about 20 people in the music section, while I was searching for new albums nearby. They sounded good, but I didn't stay to watch the whole gig as I had sauna to go to. Unfortunately I don't know who they are, as I didn't know about the gig beforehand and the library homepage doesn't have a mention about the gig (at least not anymore).