What are you going to record to? The R16's or a computer?

I'm not saying you can't do it, but at first glance the R16 has no digital connection to sync them together. So getting two of them to play nice may be problematic.. check that out before going this route.
Otherwise you'll have to export the tracks from the R16's to a DAW and try to sync them there, so you may as well record in a DAW to begin with.

Need more details on your plan.


Make your sound your own!
.. I do not work here, but the benefits are still awesome