They publish some beta version of the firmware. And in past times there was a hidden sysexes to enable new delays for example. Some user found a “bug” which enable those new delays and I looked at preset midi file and concluded sysex (nrpn and value) to enable those new features. I’ve published this on this guy thread . They wanted to show this at NAMM as a new feature so I think they were angry that someone posted this. Voila!! 😛 That was my stupid mistake.
