The arpeggiator is NOT yet documented. Mostly because it is not yet finished.
But to engage the ARP, you press and hold down the "Poly" button and then press sequencer "Start" button.
You will notice that pressing the Poly button toggles between "Poly" and "Portamento" mode. So you can operate the ARP in both modes. But to get into Poly Arp mode requires setting Portamento mode first (by pressing Poly button) then pressing and holding the Poly button again and then press Start.
The ARP has a bug in it where it drops out notes. But other than that, it works. It is "as played" mode only. There is no other mode yet.
/Mike
On Thu, 2018-11-08 at 17:46 +0000, bperkins211@... [korgpolyex] wrote: