The Lighting Controller

I am hearing a clicking noise in the audio out from my Laptop when connected to the DMX chain. I have tried both the headphones out as well as an external USB sound card but the clicking is there and very noticeable either way. The clicking seems to match the frequency of the DMX LED on my D512. Please Help I have a show on Sat that I need to use the software to play tracks and run lights for.

Nick

17in MacBook Pro
OSX 10.5.8
Xpress 6.26
D512

Very weird, because MacBook has very good reputation regarding noise protection !
We suggest you to use a usb line with noise filters.
If still noise, we suggest you to use a usb hub.