Kayo Dot is…

…an American avant garde group that was formed in 2003 by Toby Driver. They released their debut album Choirs of the Eye on John Zorn's Tzadik Records label that year.

The music of Kayo Dot bridges several genres, from heavy metal to classical music. Their songs involve complex instrumentation (composed by singer and frontman Driver). They are substantially longer than typical rock songs, often ranging from 8 to 15 minutes in length.

Tzadik's descriptive label on that album reads: "Kayo Dot powerfully integrates elements of modern classical composition with the layers of guitars and vocals more common to rock and metal. With a compositional map that is strict in form yet malleable in execution, Kayo Dot uses a vast array of instrumentation to create an exciting convergence of violence and serenity."

SOURCE: Kayo Dot, Wikipedia