Hey MoDuLard,

there will be no pre-order. I will add them to my webshop by the end of this week and other shops will also get them very soon. There will most probably be enough and surely in the first days.

could I use it as a stereo synth voice controlled by 1 CV Gate channel (modular).
Its oscillators, not really a voice (your would need to add your filter, envelopes... yourself.) You get a new tracktype dedicated for the dualchord and can control everything from it.

Can I use it with a midi channel? is it automatically on polyphonic mode? polyphony with CV Gate?? (1 note = 1 channel I suppose?)..Is it the purpose of the extra Gate ( In or out? not specified)
Yes you can fully control it through Midi in many ways. From one finger single osc/ multi-chord to poly 4 finger note etc The Gate is an output and can be used as an additional trigger/gate to be used for the envelope for example.

Last one, How to connect it and setup? Is it same as "More CV or trigger" and same way to assign it (in track assign: NSA#)??
Yes exactly like these.

I will have a live stream most probably by the end of the week to showcase the dualchord and all its features. There I can also live answer questions.

More info to come..