How about that Barbershop music?  It's an interesting sound.
Barbershop music
Barbershop vocal harmony, as codified during the barbershop revival era (1930s–present), is a style of a cappella close harmony, or unaccompanied vocal music, characterized by consonant four-part chords for every melody note in a predominantly homophonic texture. Each of the four parts has its own role: generally, the lead sings the melody, the tenor harmonizes above the melody, the bass sings the lowest harmonizing notes, and the baritone completes the chord, usually below the lead. The melody is not
single "Alright" from the album won an Ivor Novello Award for Best Contemporary Song.
In a 2005 interview with "The Times", Coombes said, "It's insane that people think we would ever sound like that again ... We're proud of 'Alright' and how well it did, but we never wanted to find a formula and stick to it. Our aim was always to progress and keep the music interesting, for us and for the fans. So the people who see us in the