STRATA

Ensemble music analysis for people who cut and perform to music. Drop in a track and get every layer as one JSON, then drive edits, live visuals and code from it.

Sections · tempo map · beats/downbeats/bars · key + local keys · chords · kick/snare/hat · notes per stem · loudness/LUFS · builds & drops · vocal activity + timed lyrics · ranked cue points · 20 per-frame curves.

Each dimension runs several open-source models and votes. Every beat and boundary carries its confidence and which models agreed, and the UI shows disagreement directly.

strata analyze song.wav --export all     # analysis.json + Premiere/Resolve/AE/MIDI/CSV/texture/report
strata query song.wav --cues --min 0.6   # structural cut points
strata live song.wav --osc 127.0.0.1:9000  # play it as OSC into Notch / TouchDesigner / Resolume
strata serve --open                      # color-coded timeline + visualizer at :3090

Try it without a GPU: strata serve --open loads the bundled demo, AXYS: "Signal Without State", with its precomputed analysis.

Use it from Claude (MCP)

strata mcp runs an MCP server on stdio, so Claude Desktop, claude.ai connectors and any MCP client can drive STRATA directly. The tools are analyze, library, summary, at, sections, cues, beats, export, live_start, live_stop and remove. Ask things like "where are the drops in this track?" or "export Premiere markers for every chorus".

Claude Desktop (claude_desktop_config.json), Linux / macOS:

{ "mcpServers": { "strata": { "command": "/path/to/strata/.venv/bin/strata", "args": ["mcp"] } } }

Windows with STRATA installed in WSL (Windows paths like C:\Music\a.wav are accepted):

{ "mcpServers": { "strata": { "command": "wsl.exe",
  "args": ["-e", "env", "STRATA_HOME=/mnt/c/Users/<you>/STRATA", "/home/<you>/strata/.venv/bin/strata", "mcp"] } } }

Claude Code users can also install the bundled skill: cp -r skill/strata ~/.claude/skills/.

Install (Linux / WSL, NVIDIA GPU recommended)

uv venv -p 3.12 .venv && source .venv/bin/activate
uv pip install torch torchaudio --index-url https://download.pytorch.org/whl/cu128
uv pip install -e vendor/all-in-one        # allin1 with the pure-PyTorch neighborhood attention (PR #39)
uv pip install --no-deps basic-pitch "git+https://github.com/deezer/skey.git" && uv pip install nnAudio
uv pip install cython && uv pip install -e ".[dev,lyrics]"
(cd ui && npm install && npm run build)
strata doctor

Profiles and licenses

STRATA's code is MIT. madmom's neural models carry non-commercial weights. They are marked nc everywhere and excluded by --profile commercial-safe. See THIRD_PARTY.md.

Exports

format	file	for
json / csv	analysis.json, beats/sections/chords/events/cues/curves.csv	code, sheets, TouchDesigner CHOPs
midi	strata.mid	DAWs: tempo map, section markers, chords, GM drums, notes per stem
labels	audacity.txt, reaper_regions.csv	Audacity, Reaper
premiere	premiere.xml	Premiere (FCP7 XML sequence + markers)
fcpxml / edl	timeline.fcpxml, resolve_markers.edl	Resolve, Final Cut
ae	strata_ae.jsx	After Effects: comp, markers, keyframed curve sliders
texture	curves.png/.npy	shaders, Notch, TD
report	report.html	single-file shareable breakdown

Design: docs/superpowers/specs/2026-10-10-strata-design.md.