I’m going to be running two H9’s and was wondering if you can use one aux switch to make both h9’s change presets simultaneously? I know you can control tap tempo on both H9’s from one aux switch by hooking up a midi cable between the two H9’s and then setting master / slave, etc but not sure about presets (up / down). I would assume you could do the same for preset switching

I don’t know about aux switches, but you can control one H9 with another via MIDI, so you could “pair” presets via MIDI messages.