Hi, I am trying to record stuff from my Pioneer DJM-600 to laptop through Audacity via headphone jack. I don't have mic jack on my laptop just headphones. I have all the proper connectors, RCA to TRS to TRRS. Output is coming from Record Out on the mixer. Whenever I try to record something it only records internal mic noise but nothing from the mixer. Is there a way to make it record through headphones input or I need external soundcard? Thank