Eventide can give you the definitive answers here. I was my own assumption that an external MIDI Clock in my system [MIDI IN DIN to the PitchFactor] and one from the H9 Control app were "competing". Any rhythmic preset with Tempo: On just sort of laid there, and Tempo: Off (based off milliseconds) brought the rhythm back.
But I'm not so sure now. The H9 Control Settings -> MIDI Clock -> Enable MIDI Input Clock seems to refer to an incoming clock to the Stompbox pedal itself (via DIN). If I set it to Yes, then I lose sync in the presets [USB to H9 Control and MIDI DIN to external clock both connected].
But if I set that parameter to No, then it "appears" to allow H9 Control to provide a MIDI Clock to the PF. At that point, I can change BPM on either the PF or H9 Control, and that change is reflected back & forth. Bottom line: I can leave my pedalboard intact, plug in an H9 Control laptop (over USB, and set to No), and program the Pitchfactor in its natural environment.
