Upgrading to NRV10 interFX Pro, you get the following features:

• MIDI support - Note and Control routing, layers, splits, multiple assignments
• 6 custom plug-ins per chain
• Additional effects. Effect processing for connected guitar, bass, microphones, keyboards...
• Track Player - media playback with slow-down option
• Independent simultaneous recording and playback (one control set for each of them)
  • Records the main output of NRV 10 or individual channels
  • Playback assignable to any of the 1-10 channels (in pairs)
• ReWire Support
• The upgrade from interFX to interFX Pro is $49.