Cross DJ, external mixer and two cdj 400

Hello!
I have a 2 channel mixer and two Pioneer CDJ 400 cd players. As far as i know the CDJ 400 can act as a soundcard aswell. I'd like to know, if I can control Cross DJ software with my external mixer and the two players without an external sound card and timecoded cds?
Thanks for your help.
I have a 2 channel mixer and two Pioneer CDJ 400 cd players. As far as i know the CDJ 400 can act as a soundcard aswell. I'd like to know, if I can control Cross DJ software with my external mixer and the two players without an external sound card and timecoded cds?
Thanks for your help.