It's also my favorite FM synth ever, and I LOVE FM synths (have owned at least a dozen if you include softsynths). Amazing experimental synth, too. Just a fantastic all arounder, and one of the best FM programming interfaces ever (better in the hardware version, admittedly, but still very good here).And just to be clear -- this is NOT SPONSORED. I just love the opsix and think more people should check it out.