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- OpenClaw
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- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
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FL Studio Scripting
FL Studio Python scripting for MIDI controller development, piano roll manipulation, Edison audio editing, workflow automation, and FLP file parsing with PyFLP. Use for programmatic configuration, device customization, MIDI transport, macros, and save file manipulation. Covers all 427+ API functions across 14 MIDI scripting modules plus piano roll, Edison, and PyFLP contexts.
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FL Studio Python scripting for MIDI controller development, piano roll manipulation, Edison audio editing, workflow automation, and FLP file parsing with PyFLP. Use for programmatic configuration, device customization, MIDI transport, macros, and save file manipulation. Covers all 427+ API functions across 14 MIDI scripting modules plus piano roll, Edison, and PyFLP contexts.
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Package facts
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- Yavira redirect
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- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md, references/api-arrangement-patterns.md, references/api-callbacks.md, references/api-channels.md, references/api-device.md, references/api-mixer.md
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Trust & source
Release facts
- Source
- Tencent SkillHub
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- Indexed source record
- Version
- 0.1.0
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- delorenj
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Documentation
FL Studio Python Scripting
Complete reference for FL Studio's Python API: MIDI controller scripting (14 modules, 427+ functions), piano roll note manipulation, Edison audio editing, and FLP file parsing with PyFLP.
Requirements
FL Studio 20.8.4+, Python 3.6+
Check API Version
import general print(f"API Version: {general.getVersion()}")
Script Installation
Place scripts in Shared\Python\User Scripts folder.
1. MIDI Controller Scripting
Purpose: Control FL Studio through hardware MIDI controllers and send feedback to devices. Runs: Continuously while FL Studio is open. Available modules: transport, mixer, channels, arrangement, patterns, playlist, device, ui, general, plugins, screen, launchMapPages, utils, callbacks Entry points: def OnInit(): """Called when script starts.""" pass def OnDeInit(): """Called when script stops.""" pass def OnMidiMsg(msg): """Called for incoming MIDI messages.""" pass def OnControlChange(msg): """Called for CC messages.""" pass def OnNoteOn(msg): """Called for note-on messages.""" pass def OnRefresh(flags): """Called when FL Studio state changes.""" pass
2. Piano Roll Scripting
Purpose: Manipulate notes and markers in the piano roll editor. Runs: Once when user invokes through Scripts menu. Available modules: flpianoroll, enveditor import flpianoroll score = flpianoroll.score for note in score.notes: note.velocity = 0.8 # Set all velocities to 80%
3. Edison Audio Scripting
Purpose: Edit and process audio samples in Edison. Runs: Once within Edison's context. Available modules: enveditor
API Module Reference Map
Navigate to the appropriate reference file based on what you need to control. Read these files ONLY when you need specific API signatures.
Core Workflow Modules
ModuleFunctionsWhat It ControlsReferencetransport20Play, stop, record, position, tempo, loopingapi-transport.mdmixer69Track volume/pan/mute/solo, EQ, routing, effectsapi-mixer.mdchannels48Channel rack, grid bits, step sequencer, notesapi-channels.md
Arrangement Modules
ModuleFunctionsWhat It ControlsReferencearrangement + patterns9 + 25Markers, time, pattern control, groupsapi-arrangement-patterns.mdplaylist41Playlist tracks, live mode, performance, blocksapi-playlist.md
Device & Communication
ModuleFunctionsWhat It ControlsReferencedevice34MIDI I/O, sysex, dispatch, hardware refreshapi-device.md
UI & Application Control
ModuleFunctionsWhat It ControlsReferenceui + general71 + 24Windows, navigation, undo/redo, version, snapapi-ui-general.md
Plugins
ModuleFunctionsWhat It ControlsReferenceplugins13Plugin parameters, presets, names, colorsapi-plugins.md
Specialized Hardware Display
ModuleFunctionsWhat It ControlsReferencescreen + launchMapPages9 + 12AKAI Fire screen, launchpad page managementapi-screen-launchmap.md
Utilities, Constants & MIDI Reference
ModuleFunctionsWhat It ControlsReferenceutils + constants21Color conversion, math, note names, MIDI tablesapi-utils-constants.md
Callbacks & FlMidiMsg
ModuleFunctionsWhat It ControlsReferencecallbacks26All callback functions, FlMidiMsg class, event flowapi-callbacks.md
Piano Roll & Edison
Note, Marker, ScriptDialog, score classes for piano roll manipulation plus Edison enveditor utilities. See piano-roll-edison.md
FLP File Parsing (PyFLP)
External library for reading/writing .flp project files without FL Studio running. Batch processing, analysis, automated generation. See pyflp.md
Minimal MIDI Controller Skeleton
# name=My Controller # url=https://example.com import device import mixer import transport def OnInit(): if device.isAssigned(): print(f"Connected: {device.getName()}") def OnDeInit(): print("Script shut down") def OnControlChange(msg): if msg.data1 == 7: # Volume CC mixer.setTrackVolume(mixer.trackNumber(), msg.data2 / 127.0) msg.handled = True def OnNoteOn(msg): track = msg.data1 % 8 mixer.setActiveTrack(track) msg.handled = True def OnRefresh(flags): pass # Update hardware display here
Key Pattern: Always Check Device Assignment
def OnInit(): if not device.isAssigned(): print("No output device linked!") return # Safe to use device.midiOutMsg() etc.
Key Pattern: Mark Events as Handled
def OnControlChange(msg): if msg.data1 == 7: mixer.setTrackVolume(0, msg.data2 / 127.0) msg.handled = True # Prevent FL Studio from also processing this
Key Pattern: Send Feedback to Hardware
def OnRefresh(flags): if device.isAssigned(): # Update volume fader LED vol = int(mixer.getTrackVolume(0) * 127) device.midiOutMsg(0xB0, 0, 7, vol) For complete examples (MIDI learn, scale enforcer, LED feedback, batch quantization, sysex handling, performance monitoring, automation engine, debugging): See examples-patterns.md
Performance
Cache module references at top level (import once) Avoid tight loops in MIDI callbacks (keep under 10ms) Batch UI updates; use device.directFeedback() for controller echo
Hardware Integration
Always check device.isAssigned() before device functions Implement two-way sync for all controls (send feedback on state change) Test on real hardware (virtual ports behave differently)
Code Organization
Separate MIDI mapping from business logic (use a controller class) Keep callbacks responsive; offload complex work Handle edge cases: invalid indices, missing devices, out-of-range values
Script Not Receiving MIDI
Check device.isAssigned() returns True Verify MIDI input port in FL Studio MIDI Settings Ensure callback functions are defined at module level (not nested) Check MIDI message status bytes match expected values
Piano Roll Script Not Working
Verify script is in Shared\Python\User Scripts folder Ensure a pattern is open in piano roll before running Access notes via flpianoroll.score.notes
Performance Issues
Avoid complex calculations inside OnIdle() (called every ~20ms) Don't repeatedly query values that haven't changed Use device.setHasMeters() only if peak meters are needed
FAQ
Double-click detection: Use device.isDoubleClick(index) Inter-script communication: Use device.dispatch(ctrlIndex, message) LED control: device.midiOutMsg(0x90, 0, note, velocity) for note-on LEDs processMIDICC vs OnControlChange: Use On* callbacks for modern code GUI access: Limited through ui module; full UI automation not available Multiple devices: Check device.getName() to identify, handle per-port
Resources
Official FL Studio API: https://www.image-line.com/fl-studio/modules/python-scripting/ PyFLP GitHub: https://github.com/demberto/PyFLP API Functions: 427+ across 14 modules | Last Updated: 2025
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
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Package contents
Included in package
6 Docs
- SKILL.md
- references/api-arrangement-patterns.md
- references/api-callbacks.md
- references/api-channels.md
- references/api-device.md
- references/api-mixer.md