I think you might need a Cerberus cord to do what you ask. Can't figure out why you would want to run three CD players into one cord? Maybe Kato spiked my tea.
I have a computer controlling them with a jukebox software. Thus the cd player that is playing depends on what song was picked. I would like to be able to record digitally from all 3 players with out switching cords. Recording medium is a md player.