the 4i4 is about as small an interface as I would ever recommend anyone to buy
this is due to the 4 outputs - 2 for monitors 2 for sending audio out to process and re-record - any smaller and you can't do this unless you don't want to listen to what you are doing - which makes life very difficult imo
in fact mostly I recommend buy the biggest one you can afford with more i/o than you think you'll ever need - really annoying if you run out of interface channels - same with mixers!
just to reiterate, try with nothing, if that fails buy passive attenuators (eg 2hp trim - cheap and always useful), if that fails buy a balanced audio out module - if your interface has balanced inputs!
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities