Set Meris Hedra to Midi ch. 2.
Connect Zoia to Hedra via midi.
Zoia Right Output goes into Hedra, Hedra’s output goes to Zoia’s Left input. Zoia’s right output goes to your amp.
Then you let it do its thing. You can select the Key at the top, Scale at the bottom. Feedback on the right. Left footswitch sets the overall global tempo. Middle switch mutes it in analog mode.

*WARNING* Make sure Hedra is OFF when you bypass Zoia, or you are going to get a terrible feedback loop.