Okay, so I didn’t think I’d make this kind of video when I started my music YouTube channel… but here we are. In this one I break down the Python code behind KeyMod, my first FL Studio 2025 VFX Script, and I walk through how I’m using VFX Script to mess with pitch and velocity in a way that’s actually useful for playing and sequencing. I show where VFX Script lives in FL, how the workflow looks (UI + script), and why I prefer opening the script in an external editor (I used PyCharm). I go through the four core functions you basically live in with VFX Script: createDialog (building the UI), OnTriggerVoice (catch the incoming MIDI voice, modify it, and trigger it), OnReleaseVoice (release any child voices tied to the parent), and OnTick (rapid updates that keep active voices in sync while re-applying note/velocity changes). Then I show my ModifiedVoice class, how I calculate pitch offsets using semitones + octaves (octave * 12), and how I clamp notes so they don’t go below/above the allowed range. On the velocity side, I explain my velocity mod flow: optional randomization between min/max, then multiplier, then base offset, and finally thresholds. The takeaway is that pitch is intentionally “integer” (no fine tuning), while velocity gets float control for way more expressive range. If you want an entry point into FL scripting, this is a pretty friendly one.