He founded two of the most influential groups in bluegrass , The Country Gentlemen and The Seldom Scene .
Duffey learned to play the mandolin , dobro , and guitar , in addition to his tenor singing voice .
Duffey founded two of the most influential groups in bluegrass , The Country Gentlemen and The Seldom Scene .
Duffey learned to play the mandolin , dobro , and guitar , in addition to his tenor singing voice .