Applying fx to external USB audio (DAW)

[karstegg]

Good day,

I recently bought a Yamaha DGX670B. Can someone assist me with the following:

I am connecting my laptop (DAW) via usb cable for midi and audio transfer. Everything is working as intended. Midi I/O is working. Audio I/O is working (via steinberg usb asio driver), however I would like to route the audio from the DAW through the DGX onboard fx. At the moment I am trying through the Mixer using the external channel, and although e.g. Reverb / Chorus is available to be adjusted, (for external) I do not hear the fx applied or the level change when I adjust it. Is it available and how do I activate it?

Thank you in advance.