Read-back-verified mixer and plug-in control for FL Studio 2026 on macOS, with audio analysis.
Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.
💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.
The AI copilot for FL Studio
PostFader connects Claude, Codex, Cursor, and other local MCP-compatible AI clients to the FL Studio project you already have open. Ask it to inspect your session, diagnose a mix, control loaded plug-ins, clean up routing, build MIDI parts, organize patterns and Playlist tracks, add section markers, or make supported changes from natural language.
All release assets · Setup guide · Explore what PostFader can do
90 tools · 8 live resources · Windows and macOS · Open source · No PostFader account
Starts read-only and never saves your project automatically.
What it can do · Workflows · Feature depth · Install · AI clients · Documentation
Unofficial community project; not made by or affiliated with Image-Line.
PostFader is a production layer for FL Studio—not only a way to send notes or change isolated controls. It gives your AI useful context from the project that is open now, plus tools to analyze exported audio, work with loaded plug-ins, compose musical parts, and carry separately requested supported changes back into the session.
| 🔎 Understand your project | 🩺 Diagnose the mix |
|---|---|
| Inspect mixer routing, Channel Rack generators, loaded effects, patterns, Playlist tracks, transport, undo/redo history position, step sequences, and parameters exposed by loaded plug-ins. | Measure an exported bounce, compare it with a reference, examine vocal-versus-instrument masking, monitor peaks during playback, and surface evidence your AI can prioritize. |
| 🎛️ Control the session | 🎹 Create and transform music |
| Rename and color tracks, adjust levels and panning, manage sends and routing, control transport, organize channels and patterns, edit steps, and change supported loaded plug-in parameters. | Generate chords, melody, bass, and drums; export multi-track Type-1 MIDI; estimate tempo and key; transcribe monophonic audio; and prepare or transform Piano Roll material. |
“Show me every instrument that is not routed to the mixer.”
“Which effects are loaded on my lead vocal?”
“Where are my drums routed, and which mixer inserts are peaking too high?”
PostFader reads FL Studio's current project state: mixer inserts and sends, loaded mixer effects, Channel Rack generators, patterns, Playlist track state, transport, undo/redo history bounds, the current step grid, and exposed plug-in parameters. Your AI can answer from the actual session instead of relying on a project description pasted into chat.
“What are the three highest-impact problems in this bounce?”
“Compare this mix with my reference and explain the biggest differences.”
“Check these vocal and instrumental exports for likely masking.”
Mix Doctor turns an exported bounce into producer-readable technical findings about level, dynamics, tonal balance, stereo behavior, and export readiness. Reference analysis compares loudness and tonal balance across aligned audio. Masking analysis uses synchronized vocal and instrumental renders to report possible spectral-overlap regions.
During a chosen observation window, a peak watch samples the mixer inserts included in the watch and remembers the highest level it observed for each. Use those results to build a gain-staging plan from a playback section or full pass that fits the window rather than a single instant. These are sampled observations, so they do not prove that every transient was captured. Your AI can use other reported findings to create a separate, reviewable mix plan.
“Rename insert 4 to Lead Vocal, color it purple, pan it 10% left, and confirm the changes.”
“Mute the backing-vocal tracks and lower the send to the reverb bus.”
“Find the feedback parameter on the delay that is already loaded and reduce it.”
PostFader can control mixer volume, pan, mute, solo, arm, selection, stereo separation, sends, and routing. It can change tempo, playback, loop mode, recording state, and song position; organize channels, patterns, and Playlist tracks; and edit step sequences.
For loaded effects and Channel Rack generators, PostFader asks FL Studio which parameters the plug-in exposes. It can inspect names and values, search or scan large parameter surfaces within explicit limits, set a known value, target the number a plug-in displays, or choose an exact named option. Bundled profiles for selected FL Studio stock effects add known parameter roles for supported workflows without pretending every plug-in has the same controls.
For those selected profiles, your AI can turn supported goals such as “tame harshness,” “control dynamics,” “limit peaks,” “shorten the reverb,” or “create a rhythmic echo” into matching parameter roles. Intent resolution is read-only; choosing values and applying a change remain separate steps.
PostFader works with the chain already in the session. It does not currently insert, remove, or reorder plug-ins, and FL Studio does not expose reliable effect-slot bypass or wet/dry control here.
“Create an eight-bar D Dorian melody with a bassline and drum pattern.”
“Transpose this Piano Roll part up an octave and humanize the velocities.”
“Estimate the tempo and key of this sample.”
“Transcribe this monophonic melody into a reviewable note sequence.”
Generate deterministic chord progressions, melodies, bass parts, and drums from a musical brief; melody, bass, and drum generation also accept reproducible seeds. Export separate parts in one Type-1 MIDI file and verify the written file's structure and content digest. Audio tools can estimate tempo and a global major or minor key, while monophonic transcription creates a note sequence that can be reviewed and exported in a separate step.
PostFader can also find and prepare a pattern FL Studio reports as empty, add section markers, organize Playlist tracks, record a supported automation value, and prepare Piano Roll append, replace, quantize, transpose, humanize, duplicate, delete, or clear operations. Piano Roll application uses FL Studio's separate script workflow, so PostFader reports the evidence it actually has instead of claiming controller-side note readback.
[!TIP] You ask: “The vocal feels buried. Find the most likely cause, show me what you would change, and fix only the highest-confidence problem.”
Read the project → analyze the bounce → identify the problem → propose a plan → choose the change → apply → report
A narrow remote control stops at individual commands. PostFader connects those commands into a production workflow.
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