Help with recording microkorg xl sounds into Traktor

Help with recording microkorg xl sounds into Traktor

Hey guys so i’ve got my Microkorg outputs going into the inputs on the back of my S4. The only way I was getting any sound was if I cranked my volume on the Microkorg and even then it was barely registering on the levels. After I switched the inputs to phono on the back I was getting great levels.

I was always under the impression that only turntables ever needed phono inputs to amplify the signal to line level. Is there a reason I shouldn’t be using phono levels to record the Microkorg XL?