[junkgear]

There are two ways you can record your drums into Pro Tools.

If you want to record the audio output from the roland sound module, you would take both the left and right audio outputs and run them into separate line inputs on the UA interface. Then you would add a stereo track to PT and assign the inputs to wherever the Roland is connected to the UA interface. This will allow you to keep the UA as the playback engine interface and you wouldn’t have to switch.

If you want to record the MIDI data in PT, then you would add a MIDI track. Since this only records the MIDI information, you would need to insert a virtual instrument on the MIDI track that has drum sounds. When you play that track back, it will trigger the sounds in the VI.