The tunes are traditional and more than a century old, or modern compositions which follow the same form as the traditional pieces.
However, they also perform works from the 19th century as well as some modern compositions.
As a measure of the school's commitment to contemporary music, each year it holds a festival dedicated to modern compositions.
Except in certain modern compositions, it is rarely absent.
In more modern compositions, they are occasionally used for their intonation or tone color.
"Half the pieces we do are of modern composition."
One way to avoid the rigors of modern composition is to ignore them.
From the start, his recital programmes included modern compositions as well.
And Christine reflects on the role of these musical, archaeological discoveries in modern composition.
But because Lion was virtually untrained in modern composition, he could not read choir parts.