Osman Arabi are a band from Libya that plays dark ambient/drone with a black metal influence and this is a review of their 2011 album "Beast Mutation Rituals" which was released by Kalpamantra.
Synths bring a very dark ambient and atmospheric drone sound to the music, while the sound effects bring in harsh noise and psychedelic sounds to this long and epic 25 minute song which uses a variety of many different sounds, as well as some samples from black metal songs.
Vocals when they are utilized are mostly black metal screams with some spoken word samples being thrown into the music, while the song theme revolves around dark occult rituals, as for the production it has a very dark, raw and primitive sound to it.
In my opinion Osman Arabi are a very great sounding dark ambient/ritual/drone/Black Metal project and if you are a fan of this style, you should check out this recording. RECOMMENDED.