Keeping a looper and any drum machine in sync is tricky unless both devices have a feature that enables them to do so. The vast majority of devices that support sync use MIDI. There are other methods but the only looper I have heard of doing this without MIDI is the Ditto X2 Jam
The Aeros for example uses MIDI. I don’t know anything about the helix but we know that the Boss RC30 does not have MIDI sync capability.
There is a thread on compatible loopers
I personally have a Boss RC10R which does have MIDI but I’ve yet to try syncing it - I’ve only just gotten around to buying the right cables.
Actually i found a video showing Helix and BB sync
