It seems to be that the only thing working reliable is arches sending out the internal clock signal via CKIN.
The internal clock is not transmitted using the MIDI DIN output and not via bluetooth – as they say in the manual.
Clock in is not working at all for me. Not via CKIN and not via MIDI DIN. I have several devices I need to get in sync, like an Endorphin.es Shuttle Control, a MacBook Pro running Cubase, a Prophet XL and an Waldorf kb37. All this gear is talking nicely together as expected, but the arches is not responding to any of these devices.
Hey soundmachines, please get this working asap, your nice device is quite useless for me if it can not sync with other stuff.