As you might guess from the album title, all of the music here was written by the composer Béla Bartok. These are rock interpretations of the pieces, though. That, by definition, really, lands this in the neighborhood of progressive rock. The music, although guitar dominated and often heavy, would do that by itself, though. All the music here is produced by three people (Nelson Coelho - guitar, Gabriel Costa - bass guitar and Fred Barley - drums) except for the first song which features a guest performance by David Cross (of King Crimson fame) playing violin. This is all instrumental and all dramatic.