SubverseLab builds free, browser-based AI tools for arranging, generating, analyzing, mixing and separating music. Everything runs in the browser with nothing to install, and everything below is free to use; some tools ask for a free account.
Genre-Aware Arrangement Starting Point Generator
Generate a genre-aware arrangement starting point, preview its structure and learn how to rebuild the idea in a DAW.
8-Bar MIDI Drum Pattern Generator
Generate 8-bar MIDI drum patterns in any of 22 genre styles, thin them live with per-channel density knobs, preview them on a 16th-note step sequencer across six drum channels, and export the result as standard MIDI files or a ZIP for any DAW. Pattern generation and every official export require SubverseLab membership.
Generate a Drum Pattern · Read the Sensei Drum Generator guide
Evidence-First Audio & Signal Measurement Console
Evidence-first audio measurement for your mix or master. Direct ITU-R BS.1770 LUFS, sample peak, crest factor, and one-third-octave spectral analysis, compared against a reference track or a genre profile, plus mono fold-down phase-loss detection. No fabricated scores, no invented metrics — just what the signal actually shows. Requires a free account; one analysis per day.
Stem separation, vocal removal and key/BPM analysis, in the browser
Separate a track into drums, bass, vocals and other instruments, pull the vocal off a mix, or read a track's tempo and musical key — all in the browser, nothing to install. Separation uses the HT-Demucs model with overlapping windows, so the stems have no seams at the segment joins. Key and BPM analysis is unlimited for members; separations are one a day.
Generative MIDI Pattern Workstation
Generate a 16-step synth pattern across four lead and two bass lanes, evolve it, shape the in-browser sound preview, and export the result as a standard MIDI file for any DAW. Patterns are ranked by a model that learns from what members choose to keep. Generation, evolution and every export require SubverseLab membership.
BPM and Key Calculator for Delay, Reverb and Repitch
Calculate BPM-synced delay and reverb times, key-to-Hz harmonics and sample repitch math, and hear each value before you use it. Runs entirely in your browser — no upload, no server processing, no account.
Every tool has a written guide explaining what it does, how to use it, and what its limits are. Browse all guides or read the help and FAQ.