Reply to Can I record my vinyl sets with my internal soundcard (Korg Zero 4)

So I was watching TV and I saw a hard dnb set, I immediately fell in love with the genre again. It's been months since I played dnb.

And was real pumped and did an hour long set with all my HARD dnb records.
It was amazing. Best improv ever.

But is there a way to record that set ?

Please note:
-The mixer has a record out, but it's currently in use, I hook up my speakers with RCAs instead of XLR.
-The mixer is digital and I can hook it up to a laptop with FireWire (Audacity perhaps ?)

I guess the only way is to buy one of those soundcards specificly made for this, but I don't want to spend the money.
I've seen some routings but that is for traktor scratch setups...