The dominant seventh-type chord is so important to barbershop harmony that it is called the "barbershop seventh".

This is a group of over 30,000 women committed to advancing the musical art form of barbershop harmony through education and performance.

The musical styles included rock, pop, blues, reggae, barbershop harmony, James Bond themes.

He loved to sing, and he taught his children to sing barbershop harmony.

The quartet sings non-traditional barbershop harmonies with a contemporary touch.

The quartet combines traditional barbershop harmonies with contemporary music styles.

"The sound of barbershop harmony is like nothing else in the world," Ms. Siemers said, echoing other members.

And then there are those fellows whose hobby involves getting together with about 85 other men to sing barbershop harmony.

The chorus produced two ETV shows on barbershop harmony.

Several international affiliate organizations, in countries around the world, add their own flavor to the signature sound of barbershop harmony.