How to setup halion 6 to use as an effect for audio track?

i know its possible to use retrologue as effect for audio track (needs some routing in cubase and setup inside retrologue , like turn off the oscillators and raise the input knob etc…)
but how to do it with halion ?
1:do i need to build a “synth” from a scratch inside halion or can i use one of its synths for filters, fx etc… ?(lets say "Voltage, LoFi piano,simple etc…)
2:how can i get the signal from the audio track ? there is no “input” knob built in in halion as in retrologue
3: if its possible to input the audio signal into existing “synth” of halion , how to disable its own oscillators
{this video shows how to use retrologue as an effect}