On Aug. 31, Icelandic singer Bjork [ tickets ] releases "Medulla," her first new studio set since 2001's "Vespertine."

The album finds her "exploring the rich potential and remarkable range of the human voice," according to Elektra Records, and "performing over percussive beats created by some of today's masters of human beatboxing, including Japan's Dokaka, the U.K.'s Shlomo and former Roots member Rahzel."

Other guests who lend vocals to the album include Mike Patton (Faith No More, Mr. Bungle), Intuit throat singer Tagaq, classical singer/human trombonist Gregory Purnhagen (Philip Glass, Gavin Bryars) and two full choir groups: the Icelandic Choir and the London Choir.

The vocals and percussion are fused with electronic music programmed by artists such as Jake Davies (U2, Madonna), Valgeir Sigurdsson (Mum), Olivier Alary (Ensemble) and San Francisco-based duo Matmos, which handled programming on "Vespertine" and during that album's supporting tour.

A limited-edition, digi-pak CD released simultaneously with the regular version of the album will feature additional artwork and a 16-panel poster.

Bjork self-produced and arranged "Medulla," and enlisted frequent associate Mark Bell to co-produce four of the album's tracks.

The full tracklisting follows:
"Pleasure Is All Mine"
"Show Me Forgiveness"
"Where Is the Line?"
"Vokuro"
"Oll Birtan"
"Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)"
"Submarine"
"Desired Constellation"
"Oceania"
"Sonnets/Unrealities XI"
"Piano II"
"Mouths Cradle"
"Wednesday(Midvikudags)"
"Triumph of a Heart"