I’ve done a bit more research on this and it seems the Beatstep CV is in-fact sending out a range of 2v to 7v, not the 0V to 7v as stated in the manual!
I think this explains why I can’t reach the lower end of the range set on the hotknob.
If that’s the case, I think the only fix is to somehow attenuate the CV signal by 2v before it reaches the H9’s expession jack. I have no idea how to do that though. Is a cheap fix possible?
I have no idea if Arturia intend to fix this issue. They really should, or at least alter their written documentation accordinly.
An alternative fix would be for Eventide pedals to receive MIDI NOTE messages. Again, not sure how feasible this would be/plus how useful it would be for pedal users.