Why do we sing? Obviously because it’s fun.But also so that the audience will appreciate what we do.That is why the musical communication between choir and audience is very important! Sing by heart!
The bad example is when the choir enters in two straight lines with serious and solemn expressions.They lift up their music at exactly the same time when the conductor gives the sign (often this is the only co-ordinated event in the concert) and sing 4 bright and cheery songs. They take the applause with a serious faces and leave the podium in two perfect lines. This situation cannot create contact with the public.
When we have a concert we have to think about the audience. It’s for the audience we are singing. So, sing by heart!!!