Here it is, my version of the Burns Buzzaround. I must admit it's got a really nice sound with a lot of versatility! Controls are Timbre, Sustain, and Balance. Soundclips
here (ac-128 plus 2 Mullard OC transistors, DI), and
here (3 ac-128 transistors, MIC). The pure ac-128 Buzzaround has a lot less background noise and is smoother sounding. The one with the Mullards is a bit more full on.