I've only been using the ARP 2600 v for a couple weeks. I use it both in standalone and VST mode on my Intel Mac.
A major problem I'm encountering is that while I can change the number of voices on some of the presets, I can't add voices to a preset that began as monophonic. So if I begin with the 1 oscillator template, I can never make my original patch polyphonic. Is there something I'm doing wrong?