StemsAI Mixer v1.0 Beta

StemsAI Mixer

Fix muddy / harsh AI tracks from Suno & Udio – in your browser.

StemsAI is a small, focused “mix fixer” for AI music. Drop in stems (or a full mix) when you don’t want to open a full DAW – clean up low-mids, tame brittle highs, add a touch of movement and export in minutes.

🔒 Privacy First: Audio is processed locally in your browser. We do not upload your files.

Open StemsAI (Free Beta)

No sign-up • No installs • All processing stays in your browser
v1.0 Beta – Hosted by ChiptuneAI.app • Desktop Chromium browser recommended

Free Tier Limits

StemsAI Free (v1.0 Beta)

Designed for quick clean-ups of individual AI-made stems and Suno/Udio tracks.

  • Up to ~6 stems per project (tested target).
  • Up to ~4 minutes per export recommended.
  • Local-only processing – no file uploads.
  • Record & Bounce export paths (WEBM + WAV).

Tip: For best results, use unmastered AI stems rather than fully mastered songs.

New in v1.0 Beta

New Tools & Workflow

v1.0 Beta adds a full mini-mix workflow around AI stems:

  • Humanizer panel with one-click movement tools.
  • AI De-Verb to tame smeared vocal reverb.
  • Normalize to -12 LUFS helper on the master.
  • Clip markers when your mix hits 0dB.
  • Project save/load to JSON files.
  • One-shot sample rack for shouts and FX.
AI Stem Cleaners

Fix Harsh Tops & Messy Lows Fast

The AI Stem Cleaners panel is tuned around common AI issues:

  • AI De-Haze (Non-Bass) – smooths harsh, glassy highs on non-bass tracks.
  • Bass Mono-Maker – centres low-end for Kick/Sub/808 stems.
  • AI De-Verb (Vox/Lead) – helps pull back “AI wash” reverb on vocals & leads.
  • Uses names/roles (Kick, Bass, Vox, Pad, etc.) to target stems intelligently.
Humanizer Panel

Add Subtle Human Movement

Make static AI stems feel less robotic without re-writing the song:

  • Micro Pitch Drift for pads/leads/vocals.
  • Human Duck Wobble for more organic sidechain feel.
  • Breathing Chorus and Vocal Air Ride.
  • Delay Throw for one-off echo moments.
  • ⚡ FULL PRO HUMANIZE (Experimental) – an aggressive chain that only suits some simpler tracks.

FULL PRO HUMANIZE is experimental in this Beta – it can overcook busy mixes. Start with the individual buttons first.

StemsAI Pro Exploring – not launched yet

StemsAI Pro (Coming Later, If Needed)

Right now, StemsAI Mixer is completely free in-browser. Any feedback is welcome to see whether a paid Pro tier makes sense for heavier work.

  • ⏱️ Longer exports for extended mixes.
  • 🎚️ Support for more stems and larger projects.
  • ✨ Extra export options (stereo/dual, alt bounces).
  • 🧠 Advanced de-harsh / tone-shaping & saturation tools.
  • 🚀 Batch processing for multiple files in one go.
  • 💾 Enhanced local project management and presets.

There’s no mailing list or paywall right now. If Pro happens, it’ll be announced here first and the free version will stay.

Why Not Just Use a DAW?

In lots of cases, the right move is still to mix in a proper DAW. StemsAI is for those in-between moments where you just want to quickly fix an AI track without booting a full project:

  • Faster: tweak a quick mix when you don’t want to open or create a DAW project.
  • Lighter: runs in the browser – handy on work/school machines or laptops without your usual plugins.
  • Focused: tools are tuned around common Suno/Udio issues: harsh tops, smeared reverb and messy low-end.

How to Fix AI Music Stems with StemsAI

AI music generators like Suno and Udio are great for ideas, but their stems often have harsh highs, smeared reverb and “too wide” low-end that collapses in mono. StemsAI Mixer is a small, focused Web Audio tool hosted here at ChiptuneAI.app to attempt to clean those stems quickly before you upload anywhere.

Step-by-Step Quick Start

  1. Import: Drag your generated stems (MP3 or WAV) into the mixer, then rename them (Kick, Bass, Vox, Pad, etc.).
  2. Clean: Use AI De-Haze on bright synths/pads and AI De-Verb on vocals/leads.
  3. Fix Lows: Run Bass Mono-Maker on your Kick/Sub stems so the low-end hits in mono.
  4. Humanize: Try Micro Pitch Drift + Breathing Chorus on musical parts; keep drums mostly clean.
  5. Export: Use Record for a true “what you heard” capture or Bounce to WAV for a static mixdown.

Other Tools

Want to mix full songs instead of stems? There’s also an experimental Auto-DJ mixer.

Open Auto-DJ Mixer →