[Top Jimmy]

In Pro Tools’ Hardware Setup, make sure optical format is set to ADAT and clock source is set to optical. In I/O Setup, default the input, output, bus, and insert tabs. This will make sure you can see all the inputs and outputs at your tracks.

The UMC1820 won’t be the simplest thing to use to get expansion with your 002 since it is a USB audio interface. A simpler option would be the ADA8200. But, you can configure the 1820 to send the mic ins to the ADAT outs via whatever proprietary cue mix function they provide for it. You’ll always need to have the 1820 plugged in via USB to do this even though you won’t be using the USB connection to get audio into Pro Tools. The 1820 clock source should be internal with an ADAT cable going from the 1820 output to the 002 input.