I dont know for Arbhar but Morphagen can handle signals from modular and from your sound card output.
Page 38 : The Auto-level procedure has been replaced with an improved input gain staging, accessed with a 4-step gain selection (blue-green-orange-purple). To use, Hold Record, and Press Shift to step through the gain settings: Blue, low -3db, Green, modular level, Orange medium +6db, Purple high +12db.