Commentaire officiel

@Berrnard > Unfortunately as the RMX-500 is an outboard piece of equipment and the DDJ-SZ doesn't feature a send/return, the audio signal is does not come back to the SZ for input to record (and I do NOT recommend connecting it to an input as it could possibly create a feedback loop).
As @ramon suggests, you could connect the output from the RMX into the input of another computer (or even the same computer if you have a line-input - do not use the mic input for a line level).