Devotional is a new collaborative album with Greg Anderson (sunn O))), Goatsnake, Engine Kid) + vocalist and violinist Petra Haden, who first worked with Anderson during his time in Goatsnake, as well as on the second SUNN O))) studio album, OO Void. Devotional is a rapturous and heady offering of wordless vocalizations, droning guitars, and heaviness explored in unexpected and intoxicating ways. Inspirations came from deep listening to Indian classical music, as well as a fascinating look at the chaotic and unbelievable life of Ma Anand Sheela and the Rajneesh community. Through a haze of incense, flowing robes, and secret mantras, Haden's voice rings out over constant drones in ecstatic chants throughout this musical investigation into the myriad of ways in which worship can lure and intoxicate. This is a journey that Haden and Anderson go on together, the guitar and vocals combined like the call and response of a guru and their congregation. Greg Anderson comments on the album, "I'm extremely happy with the recordings we made together. Petra's vocals bring a whole new dimension to the heaviness."