Can I sync performances using the Arpeggiator with the BPM (clock) of an external MIDI device?

Yes. You can select an external MIDI device in [MIDI IN Settings] category < [Sync Source] of the Settings menu.
For details, please refer to the [MIDI IN Settings] setting in the "Settings menu" in the Instruction Manual.
You can download the Instruction Manual from our support page <https://www.ーーー（TBD）>.