In an unusual move, Sara Bareilles steps in as lead vocalist on the group's arrangement of her song, "Gravity." The heart-wrenching subdued intensity of the song survives the translation to a cappella, becoming more lush with the bed of vocals providing buoyancy to Bareilles' melody.
In total, Sonos' first album is a wonderful mix of perfectly blended a cappella vocals, excellent production, and compelling arrangements of pop and rock tunes. They don't need to rely on flashy vocal tricks or a repertoire of top 40 hits to make their mark. I recommend this album for vocal music enthusiasts looking for quality recordings outside of mainstream a cappella music.