What's the difference in these 3 boards?

[ugh]

I'm trying without much luck to find out the difference between the keyboards below to use as a midi controller.

Casio WK-210STAD
Casio WK-210
Casio WK-200

I'll be triggering Cakewalk Sonar v4 Producer and Mixcraft v4

Thanks

 

[goz211]

You say "triggering."

If you are not planning on using the internal sounds any cheap 5 octave keyboard with a midi out will get you going. Maybe you could borrow one from a friend to check you can get your set-up going - then pick something up cheaply in the used ads of your local paper (or Gumtree or EBay or whatever).