Dude, grab a mono audio cable with 1/4 inch plug on one end and 1/8 inch on the other. Plug the big one to your left/mono channel of your DJX and plug the small one to your other stereo with small hole which is intended for microphone. and you're all set!!. This is the easiest way you can go to record your work to your cassette. If your not using this for professional reason this is alright. The best way is just grab any 4-track recorder. They are dirt cheap now and you can use the same cable you use to plug in your synth to your amp.