Not sure about fl studio 9, but it works in Ableton, so it might be that it's just not compatible with your DAW. Makes a percussive, plucked kind of sound. Not great, or massively versatile, but I've used it - in conjunction with String Thing - for driving, repetitive drones, reminiscent of 70's German electronic pioneers like Cluster, Noi, etc. 4/5, for helping to fill-out a couple of tracks I was really pleased with.
Go to Youtube, there are tons of how too vids for fl tutorials, download the vid get fl up n play it along and pause it as you go, it's not easy but I can't tell you how helpful.
