The original author seems to have been missing in action for quite some time, though it's not the first time. He disappeared for a long time before the last exciting, though flawed update, which led to a github fork at the time. When he re-appeared to much fanfare he communicated great intent to maintain Phasex, and then promptly disappeared again. Attempts by multiple people to contact the author through numerous channels have been unsuccessful so far as I know. 

It would be a shame for Phasex to go by the wayside, as it really is a very cool sounding synth, problems aside.