Do I need to buy a sound card

Hi there,
I have the discover DJ controller and the Cross discover DJ LE. I wasn't expecting to have to buy extra bits as the box says: everything you need to be a DJ (or something similar) and the system requirements do not mention multi channel sound cards. However, from reading this forum I understand I need a multi channel sound card to allow me to cue from headphones (I hope I'm getting the terms rights).
So how do I know if the inbuilt sound card on my laptop will do the job? My investigation so far has only given me "IDT High Definition Audio Codec"?? Does this mean anything to anyone??
If I do need to get a new soundcard then I'm looking for something very cheap - just enough for us to get up and running and have a bit of a play. I don't want to spend any real cash until I know if it's something we're going to get into. I've looked on ebay/amazon for multi-channel sound cards but I'm not sure what I'm looking at. If the sound card is 5.1 or 7.1 is that all I need to know - or are there more things to consider?
Thanks for your help
Jon
I have the discover DJ controller and the Cross discover DJ LE. I wasn't expecting to have to buy extra bits as the box says: everything you need to be a DJ (or something similar) and the system requirements do not mention multi channel sound cards. However, from reading this forum I understand I need a multi channel sound card to allow me to cue from headphones (I hope I'm getting the terms rights).
So how do I know if the inbuilt sound card on my laptop will do the job? My investigation so far has only given me "IDT High Definition Audio Codec"?? Does this mean anything to anyone??
If I do need to get a new soundcard then I'm looking for something very cheap - just enough for us to get up and running and have a bit of a play. I don't want to spend any real cash until I know if it's something we're going to get into. I've looked on ebay/amazon for multi-channel sound cards but I'm not sure what I'm looking at. If the sound card is 5.1 or 7.1 is that all I need to know - or are there more things to consider?
Thanks for your help
Jon