Yes a MIDI input module could be a good idea, as I have an OP-1. Although I figured that Ears could be a good way of inputting external audio. Although I'll be honest, I'm suprised to hear some say this wont work - yes I am new to modular, but I've seen quite a few videos on Youtube (Lightbath, etc.) and Instagram of people using small units with similar modulars, and they units generate the warm ambient soundscapes that I wish to.