It used smooth, consonant vocal harmonies, with a number of singers imitating instruments while singing nonsense syllables.

"Let Me Know" is a traditional love song with smooth harmonies and a Wall of Sound-influenced sound.

The song also bears a smooth harmony and contains no clear references to the rockabilly style.

The group featured two men and two women doing satirical songs with smooth harmonies somewhat similar to the Manhattan Transfer but without the jazz leanings.

No individual voice stands out, as they work together to create a smooth and pleasing harmony.

Martin favored smooth harmonies and a subtle rhythmic dynamic in which her singers were slightly, almost imperceptibly, behind the beat.

But the group could also add smooth, Eagles-style harmonies to a song like "Excitable Boy."

Their songs, with their smooth and tight harmony, are favorites of barbershop quartets.

The song's rough rhythmic style counterpoints its smooth harmonies.

The engine and transmission worked in smooth harmony.