It's an external soundcard I use.They are about £15-20. Has left and right RCA inputs and outputs with USB you plug into computer/ laptop. Plug the RCA you would plug into your amp from the turntable into it and have the outputs going to a spare channel in your amp. You need to make sure the sound input via the computer settings is stereo though. Test it is going into Audacity in stereo (the panning at the end of Interstellar Overdrive or something obvious).