Thanks abacus for the info.
I saw the link with the OAS7 Interface.
The picture 14th, seem probe that OAS7 still can drive only 4 VST .

In this link you can see that the MS is able to open much more: http://www.lionstracs.com/store/msos-update-pi-139.html http://www.lionstracs.com/data/gui/vst.png


Strange that Wersi wil use the Cubase for hosting the VST and not another open host that will be able to open much more VST at time. Maybe if they will change, they have to rewrire a lot of code of the Midiserver, that allow the OAS to swtich in realtime the Audio+Midi VST connections trough Host and keyboard.

We use Jack connection and this toll make all automatically under a script code.
For sure they will upgrade this features too.
Thanks again