Nightwish bassist Marco Hietala, proud owner of one of Roadrunner's best beards, was interviewed recently when the band played Atlanta on its current tour. In the clip above, he discusses the band's latest album Imaginaerum and its lyrical themes; the band's creative process; the transitions involved in bringing Anette Olzon in as vocalist; and much more.

Nightwish tour dates in the US continue through October 14; find a show near you!

Imaginaerum is available everywhere - grab a copy from the Roadrunner webstore!