record voice

hello

I'm on Traktor pro 4 and I get a S3 and a F1. I'd Like to loop my voice, I put the mic on the S3 and put on Mic D. then I opened the loop recorder but I can't have only the D, the voice, on the loop recorder. it always take the others deck or cells from the remix set. Can I Record only voice on the fly and how ? thx a lot