I've got the B:assmaster. The thing about the Ed Friedland video is that he just has the gain cranked, but to get the octave effect, you have to set the gain to just the right point, then the higher octave jumps out. The Black Cat Bass Octave Fuzz sounds almost the same. It's like the Octavia that Hendrix used. It also helps to turn the tone down and use the neck pickup. Here's a clip of the Black Cat version:
(Melody Maker bass for the solo, Fender Mustang reissue doing the bass part). I can't say that this is the way it's "supposed" to be used, but, well, I think this is the way it's supposed to be used. Here's a clip of the Barker:
- this one is three tracks of Guild Starfire I, one clean, two through the B:assmaster. It's kind of a weird sound - brassy actually describes it pretty well, which makes sense of the "brassmaster" name. But to get the octave, you are basically on the edge of the sound petering out too.