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MIDI FX

VFX Script

Image-Line

Where to get itAvailable from Image-Lineimage-line.com

VFX Script is a MIDI/automation effects plugin for FL Studio's Patcher that allows real-time transformation of incoming MIDI notes and automation parameters using Python code. It enables users to introduce sequential logic and memory-dependent processing into Patcher setups, with output behavior dependent on previous states rather than just current input. Programming skills are optional thanks to pre-made presets, making it accessible for building advanced audio applications and dynamic, responsive MIDI processing workflows.

Written from the manual and checked against it. How we check

Key Features

01Python-based note and automation manipulation with full language support
02Four operational tabs: User interface, Script editor, Compile, and Log display
03Voice class with properties: note, finePitch, pan, velocity, length, fcut, fres, color, and output routing
04Event handlers: onTriggerVoice, onReleaseVoice, onTick for sequential and state-dependent logic
05UI control types: input knobs (float and integer), checkboxes, dropdown menus, text fields, and embedded Control Surfaces
06Output controllers for automation signal generation and parameter modulation
07Pre-made preset scripts covering envelope generation, harmonization, microtuning, LFO creation, and note gating

Things to Try

  • 01Use onTick() with vfx.context.ticks and vfx.context.PPQ to generate timed sequences that respond to project tempo
  • 02Create custom voice classes inheriting from vfx.Voice to store persistent properties like noteOffset or parentVoice for slide note handling
  • 03Apply pitch offsets in semitones by modifying v.note during onTriggerVoice, then re-apply them in onTick after copyFrom to maintain continuity
  • 04Build conditional MIDI gates by checking threshold values in onTriggerVoice and only calling v.trigger() when conditions are met
Formats
STANDALONE
User Manual↗

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