Compass Records, the Nashville based label run by banjo player Alison Brown, has recently redesigned their website and is now offering one track each week as a free mp3 download.
The free track as of this writing is not from a bluegrass artist. Compass handles artists that fit in the americana/bluegrass genre, but also covers celtic, jazz, jam, and pop/adult-alternative. Judging by their artist roster I would only expect the free download to be from a bluegrass artist about once every 6-8 weeks, but it’s worth keeping an eye on it. You might find out about some music you weren’t aware of previously.