Yes you can...
I have both and have done it numerous times.
The signal coming out of the lightpipe output is your mixed down stereo signal from your MR8... So whatever mixdown you do with the sliders will be recorded to your Master unit, in this case your VF16.
In your setup on the VF16, you can set your lightpipe input to be any 2 of the 16 channels you want to use... (or even mix to mono if you choose). There's a 'Digital In' in the setup menu and you set Left and Right channels there.
If you're not familiar with Midi MTC, start reading up on it before your VF16 arrives and add it to your toolbox as well...
I can synch both machines up via MTC, record a few tracks that I've recorded onto my VF16 into the analog inputs of the MR8, Take the MR8 onsite to a grand piano in an auditorium, or to a friend's house etc and let him record along to the tracks from the VF16....
When finished, Synch up the two decks again, attach the Toslink cable and mix my onsite tracks back into the VF16 without worrying about having to adjust anything...
Works pretty slick...
edit: As a bonafied live 'digital mixer'... no... You can only transfer your 16 bit 'Normal' recorded tracks.
Hope this helps!
