| He counts work on Shostakovich's quartets with Rostropovich as among the high points of his musical life. |
| These include lieder, thirty string quartets and six symphonies, plus numerous overtures and choral works. |
| Brady Johnson has been singing in gospel quartets for many years and is a member of the Muddy River Quartet. |
| From barbershop quartets to gospel close-harmony groups to doo-wop to the kooky a cappella experiments, vocals-only pop music has a long history. |
| Each of the cafes along the edges of the square had a band, mostly quartets playing classical music or jazz or some show tunes. |
| Barbershop singing originated in the US at the turn of the last century, when quartets would sing in real barbers' shops. |
