Harv, this is what is in the placemat which is the user manual (I HATE this trend!) about sync.

SYNC IN/OUT jacks
Use these jacks with the included cable to connect the volca beats to a monotribe or other compatible equipment, such as an analog sequencer, and synchronize them. The SYNC OUT jack sends a 5V pulse of 15 ms at the beginning of each step. If the SYNC IN jack is connected, the internal step clock will be ignored and the volca beats sequencer will proceed through its steps according to the pulses that are input to this jack. You can use this jack to synchronize the volca beats´s steps with pulses that are being output from the audio output of a monotribe, another analog sequencer or a DAW.

That 5v is exactly what the JU-06 manual (placemat! grrrr.) says it wants coming into the Ext Clk In port to play sequences in time with an external clock. So I think this will work like I want it to. And the value add is that it IS a drum machine (though only 8 voice) so I can also play kick, hat and snare on it. That fits the techno kind of thing I have echoing around in my cavernous head at the moment. I watched an Alan Parsons concert that I have on my hard drive AGAIN last week and if there was anybody I would like to be in my next life it is Alan Parsons. That blend of techno and funk he performed was (pun intended) music to my ears! I LOVE that stuff. Alan Parsons, The Thompson Twins, Talking Heads, Howard Jones, Thomas Dolby, a lot of the underpinnings of Pink Floyd... I could listen to that all day forever. Tom Tom Club got kind of way off into left field though.