Claypool continues to tour behind "Of Fungi and Foe," which surfaced in March. The set features a guest jam session with Gogol Bordello frontman Eugene Hutz, and was inspired by a pair of soundtrack projects that Claypool recently participated in.

"Sometime back, I was commissioned to write soundtrack music for two projects that promised to have quite a bit of very intense and unique imagery," Claypool wrote on his website. "One was for an interactive game about a meteor that hits Earth and brings intelligence to the mushrooms within the crash proximity, and the other was about a 3,000-pound wild boar that terrorizes the marijuana fields of Northern California.

"Obviously, the makers of the subsequent 'Mushroom Men' game and 'Pig Hunt' film were very aware of my tastes and perspectives, because the music oozed from me in such a natural way that I believe it came as much from my pores as it did my mind. This music became the foundation of the songs that fill this collection."

The new release is the follow-up to Claypool's 2006 effort, "Of Whales and Woe," which was his first studio record to sport his own name on the cover. Since that album, he has also issued the 2007 "Fancy" DVD, which documents his 2006 solo tour, and last year's year's "National Lampoon presents Electric Apricot: Quest for Festeroo," a feature-length mockumentary about jam bands.