The World's First AI Mixing, Mastering & Music Generation Studio

StemDesk

Drop stems in. Get a mixed, mastered, release-ready bounce back — no DAW and no extra plugins required. Need a new vocal or instrument? Generate it with AI locally on your GPU — key-matched, BPM-synced, with lyrics you wrote or lyrics the AI writes for you. StemDesk ships with a complete built-in plugin suite, 87 genre profiles, deep spectral analysis, one-click auto-mix, platform mastering, natural language mix control, FabFilter preset generation, and full Pro Tools & Reaper session export. All AI. All local. Nothing uploaded.

AI-POWERED • STANDALONE • PLUGINS INCLUDED • PRO TOOLS • REAPER • 100% LOCAL

StemDesk Dashboard

STEMDESK DASHBOARD — AI MIXING, MASTERING, MUSIC GENERATION, LYRIC WRITING, SPECTRAL ANALYSIS, PRO TOOLS & REAPER EXPORT

Mixing Is 80% Setup, 20% Creativity

Every mix starts the same way: gain staging 30+ tracks, setting rough panning, carving EQ to stop stems from fighting each other, applying basic compression to tame dynamics. This takes hours of tedious, mechanical work before you even get to the creative decisions that actually define a mix.

Engineers with 20 years of experience do this work on autopilot. But it's still time they're spending on science instead of art. And for home producers without that experience, this phase is where mixes die — buried under mud, harsh frequencies, and competing elements.

Let AI Handle The Science. Then Make New Music With It.

StemDesk's AI engine analyzes your multitrack session and makes intelligent, genre-aware mixing decisions — gain staging, panning, EQ shaping, compression, frequency conflict resolution — using its own built-in plugin suite. No third-party plugins required. Then it goes further: auto-detect your session's key and BPM, generate AI vocals, instruments, drums, or bass that match your track, write lyrics from a text prompt, and split every generation into individual stems ready to drop into the mix.

Hit Auto-Mix and get a fully processed stereo bounce in 60 seconds. Master it for Spotify, Apple Music, or club play with one click. Tell the AI what's wrong in plain English — "vocals are buried," "kick needs more punch" — and watch it fix the mix. Or generate an entirely new part that your song was missing. All locally on your machine. No cloud. No API fees. No subscriptions to someone else's AI.

Five Steps. Full AI. Zero Cloud Uploads.

StemDesk runs entirely on your machine. Your audio — and your AI — never touch the internet.

1. Load Stems

Point StemDesk at a folder of bounced stems. WAV, AIFF, MP3, FLAC, OGG, M4A — any format, any sample rate, any bit depth. Or drop a finished 2-track mix and Demucs (Meta's neural stem separation model) splits it into drums, bass, vocals, and instruments automatically on your local GPU.

2. AI Analysis

The AI engine runs deep spectral analysis — 500 FFT frames per stem — computing RMS, LUFS, crest factor, spectral centroid, 7-band frequency energy, transient score, and cross-stem conflict detection. It auto-detects your session's key and BPM, classifies every track by role, selects the optimal genre profile from 87 options, and maps exactly where stems are fighting each other in the frequency spectrum.

3. AI Mix Decisions

StemDesk's AI computes gain targets, pan positions, surgical EQ (only where stems conflict), compression settings, saturation, gating, de-essing, sidechain ducking, and volume rides — all calibrated to your genre profile. Stems that don't need processing get skipped automatically. The AI explains every decision it makes so you can learn from it or override it.

4. AI Music Generation

Missing a vocal hook? Need a bass line? Generate new parts locally on your GPU using ACE-Step 1.5 — fully free, MIT-licensed, no cloud, no API fees. StemDesk suggests context-aware prompts matched to your session's key, BPM, and arrangement. Write your own lyrics or let the AI generate them. Every generation is automatically split into 4 stems via Demucs and dropped into your session ready to mix.

5. Deliver

Choose your output: hit Auto-Mix for a fully processed stereo bounce with platform mastering (Spotify, Apple, Club, Broadcast, and more) — no DAW needed. Or apply to Pro Tools via HUI in real time. Export a complete Reaper .rpp with all plugins pre-loaded. Build a new Pro Tools session via PTSL. Tell the AI what to fix in plain English. Five output paths, one app.

The Most Complete AI Audio Studio Ever Built

One-Click Auto-Mix

Drop stems in, click Auto-Mix, get a fully mixed stereo WAV bounce in under 60 seconds. StemDesk loads your actual FabFilter VST3 plugins via Spotify's pedalboard library, applies all computed gain, pan, EQ, compression, saturation, and mix bus processing in a single pass. Adjustable processing intensity (default 25%) lets you dial between subtle correction and aggressive processing. No DAW required.

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Mastering Export

Master your mix for any platform with one click. Spotify (-14 LUFS), Apple Music (-16 LUFS), YouTube, Tidal, SoundCloud, Club/DJ (-8 LUFS), Broadcast (EBU R128 at -23 LUFS), CD, or set a custom target. True peak limiting, automatic gain compensation, 44.1kHz resampling, and TPDF dithering for 16-bit delivery. Before and after measurements included.

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Complete Plugin Suite Included

No third-party plugins required. StemDesk ships with a full AAX/VST plugin suite — SD Monitor (transparent analysis tap), SD Parametric EQ, SD Compressor, SD De-esser, SD Gate, and SD Saturator — all built in C++/JUCE for real-time processing inside Pro Tools and Reaper. The plugins feed live spectral data back to the AI engine for real-time analysis without offline bouncing. In standalone mode, StemDesk's built-in DSP engine handles all processing natively. Already own FabFilter? StemDesk generates calibrated .ffp presets for your existing plugins too. Either way, you're covered.

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Deep Spectral Analysis

Every stem gets a full spectral fingerprint: RMS and peak levels, integrated LUFS, crest factor, spectral centroid and bandwidth, rolloff and flatness, 7-band frequency energy mapping (sub through air), activity ratio, and transient score. The visual spectral conflict heatmap shows which stems are fighting in which frequency bands — click any red cell for details and auto-generated corrective EQ.

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Smart Selective Processing

Not every stem needs every plugin. StemDesk's conflict-based analysis only applies EQ cuts where stems are genuinely competing (within 3dB of the frequency band owner). Compression is skipped when crest factor is already on target. Saturation is skipped for clean and acoustic roles. Stems that own their frequency space get left alone. Less processing, more natural mixes.

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Genre-Aware Gain Staging

87 genre profiles across 12 families — from Trap and Drill to Classical, Afrobeats, Reggaeton, K-Pop, Film Score, and Podcast — each with calibrated target levels and relational balance rules. The engine classifies each track by role from its filename, computes gain targets that maintain genre-appropriate balance while preserving -3 dB master headroom. Intentionally quiet and sparse tracks are detected and preserved.

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Standalone, Pro Tools & Reaper

StemDesk works as a completely standalone application — no DAW installation required. Drop stems in, auto-mix, master, and export release-ready files. When you do want DAW integration: apply your mix to Pro Tools through HUI protocol with 14-bit fader precision. Export a complete Reaper .rpp project with all FabFilter plugins and presets pre-loaded. Build a brand new Pro Tools session from stems via PTSL with automatic sample rate conversion. Four workflows, one app.

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FabFilter Preset Generation

Calibrated .ffp presets generated per-stem with user-selectable FabFilter version: Pro-Q 3 or Pro-Q 4 (surgical EQ with HPF, conflict cuts, presence boosts, air shelves), Pro-C 2 or Pro-C 3 (LUFS-relative compression), Saturn 2 (role-based saturation), Pro-G (intelligent gating), Pro-DS (vocal de-essing), Pro-MB (multiband dynamics), and Pro-L 2 (mastering limiting). Presets load directly into your installed FabFilter plugins.

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AI Music Generation — Local, Free, Unlimited

Generate vocals, instruments, drums, and bass directly inside your session using ACE-Step 1.5 — a fully free, MIT-licensed AI model running locally on your GPU. StemDesk auto-detects your session's key, BPM, and arrangement, then suggests context-aware generation prompts that match your track. Write your own lyrics, paste in a concept and let the AI write them for you, or go instrumental-only. Every generation is automatically split into 4 separate stems via Demucs and dropped into your session ready to mix. No cloud. No API fees. No per-generation charges. Generate as much as you want, forever.

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Natural Language Mix Feedback

Type what you hear: “kick needs more punch,” “vocals are buried,” “too much low end.” StemDesk’s AI interprets your plain-English feedback and translates it into specific gain, EQ, and compression adjustments across the relevant tracks. No knob-tweaking — just describe the problem and StemDesk solves it.

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AI Intelligence Panel

A full AI co-engineer built into the dashboard. Four modules: Critique (objective mix analysis with specific fix suggestions), Coach (educational guidance explaining why every AI decision was made), Diagnostics (identify phase issues, clipping, frequency pileups), and Spectral Heatmap (interactive frequency conflict grid). Smart prompt suggestions based on your stems. AI lyric generation from text concepts. Ask questions in plain English and get real answers about your mix. This isn't a chatbot bolted onto a DAW — it's an AI that understands audio.

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Reference Track Matching

Drop a reference track and StemDesk compares your mix against it — frequency balance, loudness, dynamics, stereo width. Get a match score and specific EQ correction curves that push your mix toward the reference's tonal signature. MP3 compensation ensures lossy references don't skew the analysis.

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Stem Separation & A/B Compare

Drop any finished 2-track mix and Demucs (Meta’s neural separation model) splits it into drums, bass, vocals, and instruments — extracted locally on your GPU. Built-in A/B toggle lets you compare RAW stems against the processed MIX at the same timestamp. Space bar plays, Tab toggles. Hear exactly what StemDesk changed.

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Volume Rides & Gain Automation

StemDesk analyzes each stem in time-windowed chunks, calculates RMS/LUFS per segment, and writes volume automation that rides levels up and down to maintain consistency before compression even touches the signal. Quiet verses get lifted, loud choruses get tamed. The same fader ride a mix engineer does manually — automated and exported to your DAW session.

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Sidechain Ducking

Automatic frequency-aware sidechain ducking between competing elements. Bass ducks when the kick hits. Pads duck for vocals. Guitars clear space for lead lines. StemDesk detects which stems need ducking based on spectral overlap and timing, computes the duck amount and release, and bakes it into the auto-mix bounce or exports it as automation. No manual routing required.

Three Layers. One Mission.

StemDesk is a modular three-layer system designed to scale from basic offline analysis to real-time AI-powered mixing.

Layer 1: PTBridge

Python-based DAW control via HUI/MIDI protocol (python-rtmidi + loopMIDI) and PTSL session building with automatic sample rate conversion. Handles fader control, pan, transport, bank switching. Reads .ptx session files directly. Exports complete Reaper RPP projects with FabFilter plugin chains.

Layer 2: AAX/VST Plugin Suite

Six custom C++/JUCE plugins (SD Monitor, SD EQ, SD Compressor, SD De-esser, SD Gate, SD Saturator) for real-time in-DAW analysis and processing. Feeds live spectral data to the AI engine. Also generates calibrated presets for FabFilter plugins if the user owns them. Avid AAX Developer Program approved.

Layer 3: AI Engine

The brain of StemDesk. Python analysis engine using librosa for spectral analysis, conflict-based decision making with selective processing, automatic key and BPM detection for session-aware context, ACE-Step 1.5 for local AI music generation (vocals, instruments, drums, bass), Demucs for neural stem separation, LLM integration for natural language mix control and AI lyric generation, pedalboard (Spotify) for VST3 processing, and reference track matching. Every AI model runs locally — no cloud, no API keys, no per-use fees.

Not Another Plugin. A Complete AI Studio.

Other tools process a single track or require cloud uploads. StemDesk sees your entire session, mixes it, masters it, generates new parts, and explains every decision — all locally.

FeatureStemDeskiZotope NeutronLANDRRoEx AutomixSoundFlow
Session-level control✓ Full sessionSingle trackStereo mix onlyStems onlyMacro automation
Works without a DAW✓ Fully standalone✗ Requires DAW✓ (web)✓ (web)✗ Requires DAW
Built-in plugin suite✓ 6 AAX/VST plugins includedOwn plugins only✗ Black box✗ Black box✗ No processing
No extra plugins required✓ Ships complete✗ $249-499 purchaseN/AN/A
Audio stays local✓ Always✗ Cloud upload✗ Cloud upload
One-click auto-mix✓ Full bounce in 60sPer-track onlyMastering only✓ Cloud-based
Volume rides & sidechain✓ Automated
Platform mastering✓ 8 targets + custom
AI music generation✓ Local GPU, free, unlimited
Auto key & BPM detection✓ Session-aware
AI lyric generation✓ From text prompts
AI stem separation✓ Demucs, local GPU
Genre-aware decisions✓ 87 profilesLimitedLimited
DAW session export✓ PT + Reaper with pluginsMacro only
Plugin preset generation✓ Full FabFilter suiteOwn plugins only
Natural language control✓ Plain English
Windows support✓ Windows-first✓ (web)✓ (web)✗ macOS only
Free tier✓ 2 sessionsLimitedLimited

From Bedroom Studios to Commercial Facilities

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Professional Engineers

You know what a good mix sounds like. StemDesk eliminates 60-80% of the tedious mechanical setup so you can jump straight to the creative decisions — the part of mixing that actually requires your experience.

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Studios & Facilities

Reduce mix prep time from hours to minutes across every room. Standardize gain staging practices across multiple engineers. Facility licensing available for multi-room commercial operations.

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Home Producers

Professional-grade mixing intelligence without years of training. Get a balanced, genre-appropriate starting point instantly. Need a vocal? Generate one with AI. Need lyrics? The AI writes those too. Learn by watching what the AI recommends — every decision comes with a reason.

Plans That Scale With Your Studio

Start free. Upgrade when your workflow demands it. No contracts, cancel anytime.

Free
$0
 
  • Analyze 2 sessions
  • Basic presets
  • Quick mix preview
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Studio
$49/mo
GPU recommended
  • Everything in Pro
  • AAX plugin suite
  • Pro Tools PTSL session builder
  • Marketplace access
  • Collaboration features
  • Priority AI & support
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Technical Specifications

AI Engine

  • ACE-Step 1.5 — local music generation (MIT, free)
  • Demucs — neural stem separation (4-stem)
  • Auto key detection (chromagram analysis)
  • Auto BPM detection (onset + tempogram)
  • LLM integration — natural language mix control
  • AI lyric generation from text prompts
  • Context-aware prompt suggestions
  • All models run locally on GPU (CUDA) or CPU

Analysis Engine

  • Python 3, librosa, numpy, scipy, soundfile
  • 22kHz anti-aliased downsample
  • 500 FFT frames per stem
  • 7-band frequency energy mapping
  • LUFS integrated loudness (ITU-R BS.1770)
  • Cross-stem conflict detection (3dB threshold)
  • Selective processing with skip logic

Supported Formats

  • WAV, AIFF, AIF (uncompressed)
  • FLAC, ALAC (lossless)
  • MP3, OGG, M4A (lossy)
  • Mono and stereo stems
  • Any sample rate (resampled internally)
  • Any bit depth
  • 2-track separation via Demucs

Output Modes

  • Standalone auto-mix (no DAW needed)
  • Standalone mastering export
  • HUI protocol over MIDI (14-bit faders)
  • Reaper .rpp export with FabFilter chains
  • Pro Tools PTSL session builder
  • Automatic sample rate conversion
  • .ptx session file parsing

Genre Profiles (87)

  • Urban — Hip Hop, Trap, Drill, Phonk, Grime, Bounce +7
  • R&B — Neo-Soul, Contemporary, Trap Soul, Gospel
  • Pop — Top 40, Dance Pop, K-Pop
  • Rock — Alt, Metal, Doom, Grunge, Indie, Punk +6
  • Electronic — EDM, House, Techno, D&B, Dubstep +9
  • Latin — Reggaeton, Salsa, Bachata, Cumbia +4
  • Live — Country, Folk, Jazz, Classical, Reggae +7
  • Film/Media — Score, Trailer, Game, Podcast
  • World — Afrobeats, Amapiano, Bollywood, Arabic +3

System Requirements

  • Windows 10/11 (64-bit)
  • No DAW required (standalone mode)
  • Pro Tools or Reaper optional (for DAW export)
  • 4GB RAM minimum, 8GB recommended
  • NVIDIA GPU optional (AI generation, stem separation)
  • loopMIDI (free, for HUI mode only)
  • ~3GB disk (full install with CUDA)

FabFilter Presets

  • User-selectable plugin versions
  • Pro-Q 3 or Pro-Q 4 — surgical EQ per-stem
  • Pro-C 2 or Pro-C 3 — LUFS-relative compression
  • Pro-L 2 — genre-calibrated limiting
  • Pro-DS — vocal de-essing
  • Saturn 2 — role-based saturation
  • Pro-MB — multiband dynamics
  • Pro-G — intelligent gating

20 Years Behind The Console

StemDesk is built by Asaf Fulks, founder of The OC Recording Company. With over two decades of professional audio experience — credits on Netflix, ESPN, MTV, and Disney; records with Grammy-winning and platinum-selling artists including work with Lil Wayne and Kendrick Lamar; three #1 hits mixed for Common Kings (written by Meghan Trainor); and a Billboard-charting Christian Rock track for Whosoever South — StemDesk isn't built from theory. It's built from thousands of real sessions.

Named 2016 Producer of the Year by Now Hip Hop Magazine, Asaf holds a U.S. patent for microphone technology and a B.A. in Computer Science from Denison University. He is a member of the California State Bar, giving StemDesk the rare combination of deep technical audio knowledge, real software engineering skills, and professional business judgment.

Every gain staging target, every EQ curve, every genre profile in StemDesk comes from actual professional practice — not academic datasets or synthetic training data. This is what happens when a working engineer builds the tool he always wished existed.

The Future of Mixing Is Here.

AI mixing. AI mastering. AI music generation. AI lyric writing. Built-in plugins. 87 genre profiles. Fully local. No cloud. No subscriptions to someone else's AI. StemDesk is in active development — join the waitlist for early access and launch pricing.

STEMDESK.AI • STEMDESK.NET • USPTO SERIAL 99670978

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