Question

Can I use a Presonus audiobox usb 2x2 together with another audio interface so I have more input channels for recording? How is the process behind it?

Answer 1

You will be able to if you use an aggregate device.   In OSX you can build an aggregate device as outlined in the Apple support article below...

https://support.apple.com/en-us/HT202000

In Windows, it's common to use the ASIO4ALL driver to combine different hardware..,.

http://www.asio4all.com/