If you are talking Bluegrass, you have to look at the mandolin, the instrument chosen by Bill Monroe because no one else in the family wanted the thing. So mandolins are big in bluegrass, no? I know this because I went to the Bill Monroe museum in Bean Blossom, OK?
Now if you want to talk about Miguel Aceves Mejia singing Jose Alfredo Jimenez's Guitarras De Medianoche, which I translate Midnight Guitars, be my guest. But I want to ask if you have read The Labyrinth of Solitude by Octavio Paz or in Spanish, El laberinto de la soledad, then I am almost persuaded that la vida no vale nada.