Their performance was based on searing three part harmony, humour and a respect for the tradition of song in Scotland.
The quartet then taught the guys a few traditional barbershop songs in four part harmony.
The music is well suited to adaptations such as this due to the presence of three and four part harmonies.
What followed was the sound of over 1000 voices singing in 3 part harmony filling the space with praise and song.
He has released several independent projects which are punctuated with distinct three to five part harmonies.
Garrett's older sister Amanda sings third part harmony.
It was well known for its intricate five part harmonies.
They were usually a group of males and sang in four part harmonies.
Songs sung included a four to five part harmony with multiple melodies weaving throughout one another, similar to baroque music.
The female trio was a sort of black Andrews Sisters, singing songs in three part harmony.