His Requiem is popular both with amateur and professional choirs.
He is the cantor of the only synagogue in Queens which has a professional choir at all services.
It is the only drama theatre in Russia that has retained a symphony orchestra and a professional choir.
"We couldn't afford a professional choir at all," Ms. Still said.
It is also a play on the name of The Sixteen, a professional choir admired by him.
St. Paul's Church is well known for its excellent acoustics and outstanding professional choir.
Volti is a 20-person professional choir based in San Francisco.
Only a professional choir could handle something like that.
His works are celebrated and performed by high school, college, church, community, and professional choirs today.
At 16 he became the organist of another local church and was named director of its professional choir not long afterward.