Sorry to say, bluegrass lost a great friend Sunday with the passing of Paul “Moon” Mullins. Mr. Mullins was well known in the bluegrass community, probably best in Ohio where he was a radio personality for many years.
You can see a sample of his work in this video:
Mr. Mullins is the fiddler on the left, his son, Joe Mullins is on the banjo on the right end of the stage. You can really hear Joe on tenor and Moon on baritone in that video.
You can read more about Mr. Mullins here.