They sang an a cappella mass.

他们清唱了一首合唱曲目.

The klapa music is a form of a cappella singing.

卡拉帕的音乐是一种歌唱的形式。

Then she started singing Lady Gaga songs a cappella.

接着，她开始无伴奏清唱Lady Gaga的歌。

Singing both solo and a cappella with rich harmonies was also part of the slave heritage.

独唱和伴随着丰富和声的合唱也是奴隶传统的一部分。