First things first: you should check whether you can't just trigger whatever you're trying to trigger with either the audio or analogue out directly.
If it doesn't work you'll have to use external opamps. Do some research on opamp circuits as you'll have to make it yourself on stripboard, and you'll have to power it externally as the axo power supply won't put out 10v. If it's for modular you can also use some kind of instrument input or envelope follower if you don't want to make the circuit yourself.
I plan on making a multiple pin connector from the axo into a custom module on the modular (maybe using one of those computer screen cables or something, not sure about that yet) then regulating the voltage up as well as back down to allow the Axo ton interact with the modular. The advantage of doing it this way is that I can power the module directly from the modular power supply.