Not sure when the cycle starts. If you look at the Harpegiator algo you see a restart button in the software. Middle button. You have to connect that to a midi controller. Which is inconvenient. Would makes more to me if the restart would happen at the first attack of the string or when it hits a certain threshold. But unfortunately it doesn’t work that way. So it is impossible to get in sync. The trem algo doesn’t have a restart or retrigger at all. So it will never run in sync with a metronome.