Split any song
into perfect stems.

Stem Decoder gives you studio-grade stems, MIDI and key detection in one minimal, brutally fast web app. No DAW gymnastics, no clutter.

Where Is My Mind Flip.wav
EDM 82 BPM· E major· 4:21
Decoding…
Vocals waveform
Vocals
Drums waveform
Drums
Bass waveform
Bass
Instruments waveform
Instruments
Export: Stems · MIDI · Ableton ~32s on A40 GPU

⚡ GPU-accelerated separation

Full track support – not just 20 sec previews

Built for producers, DJs and sound designers.

Works With Ableton Serum-Ready MIDI Export To Any DAW

Every tool you need in one screen.

No tabs, no chaos. Load a track and get stems, MIDI,
BPM, key, sections and sound-design hints in seconds.

Stems

Surgical Stem Separation

Vocals, drums, bass and instruments rendered as clean, phase-aligned stems powered by GPU Demucs models.

Lossless WAV GPU-Accelerated DJ-Ready

MIDI & Theory

Turn Audio Into Editable MIDI

Extract melodies, basslines and chords from stems. Get estimated key, mode and rough sections for instant re-harmonising.

Melody & Bass MIDI Key Detection Sections Map

Sound Design

Serum-Style Patch Hints

For each stem, Stem Decoder suggests oscillator shapes, filters and envelopes so you can rebuild sounds inside Serum or any synth.

Osc Suggestions Filter & Env JSON Presets

Workflow

Ableton-Ready In One Click

Download a neatly organised folder or Ableton import guide so you can drag, drop and start arranging within seconds.

Organised Folders Session Notes Producer-First UX

From track to toolkit in under a minute.

Stem Decoder is built for speed. No accounts to configure, no complex routing.

Step 1

Upload or paste a link

Drop in a full track (WAV or MP3) into Stem Decoder, or paste a download link from your library.

  • Supports long-form tracks
  • Smart naming for projects

Step 2

BeatDecoder analyzes it

Our GPU worker separates stems, runs MIDI extraction and detects BPM, key and sections in the background.

  • Demucs + Basic Pitch pipeline
  • Serum-style patch hints

Step 3

Download & create

Grab a clean ZIP with stems, MIDI and guide notes. Drag into your DAW and get back to making music.

  • Stems, MIDI and notes
  • Works with any DAW

Simple pricing for serious producers.

Start with a free test track, then upgrade when you’re ready.

Stem Decoder Studio

Full tracks, GPU stems, MIDI & Ableton guides.

✅ GPU-accelerated stem separation (full tracks)
✅ MIDI extraction for bass & melodies
✅ BPM, key & sections detection
✅ Serum-style patch suggestions (JSON)
✅ History, re-downloads & project notes

You’ll lock in this rate for the lifetime of your account.

$29/month

Early Access Pricing

FAQ

Answers to the most common questions from producers.

Can I use full songs, not just clips?

Yes. Stem Decoder is being built specifically for full tracks. The early version may have limits while we tune GPU usage, but the goal is always full-length support.

Does the MIDI line up with the stems?

MIDI is extracted per stem (bass, other/melody) with timing designed to match the separated audio as closely as possible.

Can I cancel anytime?

Yes. You can cancel your subscription at any time; you’ll keep access until the end of your current billing period.

What file formats do you support?

WAV and MP3 are supported today. Other formats (AIFF, FLAC) are on the roadmap.

Will this replace my DAW?

No. Stem Decoder is built to sit before your DAW workflow—decode, extract, then drag everything into Ableton, FL, Logic or anything else you use.

Do I keep the stems forever?

Absolutely. Once you’ve downloaded stems and MIDI, they’re yours to keep in your own library, subject to the original track’s rights.

Talk to the our team.

Stem Decoder is being built live with producer feedback.
Tell us what you need and our team will prioritize it.

• Feature ideas for stems, MIDI or sound design tools
• Collaborations with labels, sample packs & platforms
• Studio or DJ use-cases you want to streamline

Ready to see your tracks decoded?

Upload one song for free. No credit card, no signup wall.