@Guitarhacker,
like I said, if I use only one audio card, that is, the one of the Fantom G, then all the audio tracks are routed back to the Fantom while recording, thus the recorded track audio material consists of the whole mix, while I want to record only the played instrument.

I can't figure out why this is not possible in all the nowadays DAWs.

Take Audacity, for example. It can record from the Fantom G using its usb driver, and route the output to the local audio card. Sadly it can't be used really like a DAW.

Reaper can do it too - I have tested it and works, while Magix Samplitude Music Studio can't - I can confirm it because I've installed the try-out version of both programs.

It's a pity that Realband can't do it too..

Still looking for a user-friendly and easy-to-use DAW.