You don't have a vst host? Here's a list of tested free vst hosts:

Recommended free vst hosts

Because we simply can't test all possible combinations of operating systems and vst hosts we ask you for testing the plugins in your current configuration with the demo versions before you buy.

ProTools 8 PC users: It's been reported by several users that OP-X and OP-X PRO work perfectly within PT8 when wrapped with the Fxpansion VST-to-RTAS wrapper.

Mac users:

OP-X is available in cross platform Reaktor 5 format. Demo available here.

Native instruiments Reaktor5 is needed to run it.

NEW: Our flagship synth OP-X PRO-II now is available for Mac in native AU and VST3 format 32/64bit! Minimum system needed: OS-X 10.8. Learn more about OP-X PRO-II here