Sorry - I've not been entirely clear. I'm not actually firing an LED - I'm trying to pick up the 4 separate sensors in Max/PD. I left the LED code in there as a starting point if I want to add LEDs later (feel free to tell me this is bad coding admin)
PD and Max are both able to pick up the sensors, but perhaps because I used a template script, that's the reason they're not able to determine separate signals?