Hey, I'm thinking of buying the audio interface Scarlett 6i6 from Focusritte, I know it has 4 inputs (plus 2 MIDI), 2 of the inputs on the front with pre amps, but can I use the other two on the back that don't have preamps while I use the front ones? For example plugging a mic and guitar two the front and then a keyboard and a bass to the back inputs?, cause someone told me that allegedly if you use the front inputs the back ones won't work, but don't know if that's true, cause I would like to have all plugged in while I record. And also to know if this is in fact a good interface for a home studio, I hope that someone that owns this interface can help me, or someone that knows, Thanks.