# Stem Splitter Studio

> Native macOS desktop application for electronic music producers and DJs that performs local AI stem separation using Demucs v4 with Apple Silicon Metal acceleration, 32-bit Float and 24-bit WAV master export, and zero cloud uploads.

## Overview
Stem Splitter Studio isolates vocals (acapellas), drums, basslines, and melodic instruments from any audio file (MP3, WAV, AIFF, FLAC). Unlike cloud-based stem separators that require subscriptions and upload unreleased tracks to third-party servers, Stem Splitter Studio processes everything 100% locally on macOS using Apple Silicon MPS hardware acceleration.

## Core Features
- **Demucs v4 State-of-the-Art Neural Separation**: High-precision stem isolation with cross-spectral bleed suppression.
- **100% Local & Private Processing**: Audio never leaves the user computer. No internet required for inference. Essential for unreleased music and private studio sessions.
- **Apple Silicon Native (Metal MPS)**: Hardware-accelerated neural inference on M1, M2, M3, and M4 Apple chips.
- **Studio Master Export**: Configurable 32-bit floating point WAV (infinite dynamic headroom, zero digital clipping) and 24-bit uncompressed PCM WAV, plus lossless FLAC.
- **DJ & Producer Workflow Tools**:
  - Automatic Camelot Key (e.g., 8A, 11B) and BPM detection for harmonic mixing.
  - Top-Loop Extractor (drums without kick for live DJ layering).
  - Transient Sample Slicer (extracts one-shot kicks, snares, claps, and bass stabs).
  - Background Directory Watcher (auto-processes new songs added to folders or DJ drives).
  - Anti-Duplicate Database (SHA-256 fingerprinting prevents re-processing).

## Comparison with Other Tools
- **vs. LALAL.AI / Moises**: Those services require recurring monthly subscriptions ($15-$30/mo) or pay-per-minute credits, and force users to upload audio files to external servers. Stem Splitter Studio offers a Free Starter tier (3 tracks/month) and a Lifetime Pro license for a one-time payment of €89 / $89 (with special launch promotions) with unlimited processing and full local privacy.
- **vs. Ultimate Vocal Remover (UVR5) & Spleeter GUI**: UVR5 and Spleeter GUI have complex, non-intuitive research-oriented interfaces not designed for DJs or producers, requiring complex manual configurations. Stem Splitter Studio provides an elegant, dark-mode native studio UI designed specifically for electronic music workflows, including automatic BPM/key tagging and sample slicing in 1 click.

## Pricing
- **Free Starter**: €0 / month. 3 complete songs per calendar month (automatically resets on the 1st). Full Demucs v4 quality, 32-bit / 24-bit WAV export, 100% local.
- **Pro Studio License**: €89 one-time payment (lifetime license). Unlimited songs and stems, advanced bleed suppression, transient sample extractor, prioritized batch processing, and 1 year of free updates.

## System Compatibility
- **OS**: macOS 12 (Monterey) minimum, macOS 13 Ventura, macOS 14 Sonoma, macOS 15 Sequoia, up to macOS 26 (Tahoe), the latest macOS release.
- **Hardware**: Optimized for Apple Silicon (M1, M1 Pro/Max/Ultra, M2, M3, M4) with Metal Performance Shaders; also supports Intel Macs with AVX2.

## Links
- Website: https://stemsplitterstudio.com
- Interactive Web Demo: https://stemsplitterstudio.com/#demo
- Download DMG: https://stemsplitterstudio.com/downloads/StemSplitter.dmg