External sync trigger for live looper

When recording some ideas with other gear i wondered how to send this stuff to the pyramid without having timing problems or using midi files etc.

One simple trick was using a sequenced CV signal (in my case beatstep pro drum CV out) for triggering the REC button by feeding the CV signal to the footpedal plug of the pyramid. Seems to work fine; Rec is de-/activated by CV then.

But is there an easier way using he live looper with external clocks, maybe via Midi?
How do you do it?