The OP-X Free has got the same basic engine and
sound as the full
OP-X
while the available presets are limited to a few
chosen ones and the GUI only gives access to a few
parameters. The OP-X Free can’t load the patches and
banks of the full version and there’s no vst
automation or midi cc control.

However there’s an extremely cheap
way to get access to the complete OP-X sound library
and full automation: upgrade to OP-X Player.
OP-X Player has the same look as
OP-X Free, but is able to load any OP-X patch with
identical sound as in OP-X. It comes with the full
OP-X library (500 patches) and there’s automation
and midi cc remote control.
If you also want to get access to
all parameters and create your own sounds, then you
can upgrade again for a cheap price to the full
OP-X, which gives instant access to all 83
parameters on a huge and classy interface. All these
parameters can be automated and remote controlled
with midi CC.
OP-X Free is available as freeware,
while OP-X Player costs $39 USD. Check
this page
for more details on upgrade paths.
Visit
Sonicprojects