So you are trying to get your master output through one interface and your headphone output through the other?
What you want to do is have 2 rows in the table. One for the master out and one for your headphone out.
Let’s say (for arguments sake – it makes no difference) that you want the UFO202 to be your Headphone output and the UCA222 to be your Master output.
The first row should be as follows:
master, Behringer UCA222, Channels 1&2
The second should be:
headphone, Behringer UFO202, Channels 1&2
Click Apply. It should now work 🙂
The PFL buttons send the audio to the headphone out so that you can hear the output of the channel without sending it through the main speakers.
Hope that works 🙂
bob6397