My bad, I tought that the MKIV could send more that one CC per footswitch.
No problem. Their manuals could use a real improvement TBH. 🙂
I've always used the 2nd way with my 2H9s using tap tempo via an external switch on the first H9 using midi clock. With the Musicomlab setup it sends the cc value to the first H9 which sets it tempo accordingly. For the midi clock to be send out it needs to have the midi out to xmt instead of thru.
When I tried this the cc value for tap tempo received on the first H9 wasn't converted to a midi clock setting. So it doesn't seem to work. That's why I was asking if this was a bug?