Opeth will be releasing its new album Sorceress on September 30 via Nuclear Blast, and while fans are speculating/getting pissed at fans for speculating if there'll be any growling on the record, we can't provide you with an answer. However, the last 20 seconds or so of this first studio documentary showcase some seriously downtuned riffs… and that sounds awesome.
I recommend watching the whole video though, because it's still an interesting watch!