Part 2: Instrument with Lois Hornbostel With just 3 strings and a voice you’ll fall in love with, the Appalachian Mountain Dulcimer welcomes a new player with sweet, simple music. Best known for “Dulcimer Weeks” in universities, colleges, and grade schools, Lois Hornbostel is nationally appreciated as one of the most creative and talented players of the Appalachian Mountain Dulcimer. She performs and teaches across the country, wins championships, and has written internationally-sold Mel Bay dulcimer instructional books.