cjdelphi:
i know how to do both.... quite easily, my problem is the speed of which i can get arduino to modulate it's signal over USB.. 1mhz i've not benchmarked the IO speeds...
If you want to know how fast the USB works then I suggest you stop trying to convince us that your application makes sense (it sounds utterly bonkers to me) and go looking for USB speed tests. It'll go surprisingly fast - I seem to remember speeds of the order of megabits per second being achieved with Arduino - but don't rely on my memory, do a search and get it from the horse's mouth.