I purchased a Motu Microbook 1 audio interface a few years ago and now im interested in buying a monophonic analog synth , Moog Slim Phatty in particular , and since im fairly new to all the hardware business I was wondering if I can hook them up together since the only inputs on my Microbook are the stereo Line in (3-4) , the stereo mini jack (3-4) , the microphone input and the guitar input. which one should / can I use with a monophonic synth ?
thanks in advance

Yanay