The five members are: Sam Bush, Jerry Douglas, Béla Fleck, Mark O'Connor, and Edgar Meyer.

The album is progressive bluegrass with jazz inflections, but also adds elements from classical music.

O'Connor, Fleck, and Meyer further developed this genre in their compositions for orchestra and chamber music.

[1] Apart from the ground-breaking musicianship, the project is also notable because each song was composed by a different pair of the artists featured.

Each possible pair of musicians created one song for the album, one of the reasons for the name of the band, Strength in Numbers.