TuneLab
Audio
API.
Stems, analysis, transcription, mastering — 25+ audio endpoints behind one integration. Built for media SaaS and creator-tool teams who'd rather ship product than wire up five audio vendors.
curl https://api.tunelab.dev/v1/analyze \
-H "Authorization: Bearer tl_live_xxx" \
-G --data-urlencode "song=Get Lucky" \
--data-urlencode "artist=Daft Punk"
{
"artist": "Daft Punk",
"title": "Get Lucky",
"tempo": 116.01,
"key": "B",
"mode": "minor",
"camelot": "10A",
"energy": 72,
"_meta": {
"cache": "hit",
"latency_ms": 8,
"credits_used": 0
}
}What you can build with it
Open models, production-hardened: HTDemucs FT, BS-RoFormer, madmom, MAEST.
BPM & Key
Float-precision tempo (116.01, not 116). Musical key with Camelot. Confidence scores. Half/double alternatives for DJ tooling.
Beat Grid
Frame-level beat and downbeat timestamps. DJ-verified BPM. Everything you need to sync decks, auto-cue, or build a mixer.
Mood & Energy
Energy, danceability, happiness, acousticness, instrumentalness, speechiness. Trained on 114K tracks with MAEST embeddings.
Song Structure
Intro, verse, chorus, drop, breakdown, outro — with timestamps. Chroma self-similarity matrix + Foote kernel segmentation.
Universal Resolve
Any ID (Spotify, Apple, Deezer, ISRC, MusicBrainz) → all cross-platform IDs. 9.3M tracks in our identity database.
Stem Separation
4-stem vocal/drums/bass/other separation on GPU. Async jobs with webhook callbacks. HTDemucs + BS-RoFormer.
Spotify migration
One line of code to switch.
We built a compatibility shim so you can replace your Spotify Audio Features calls without touching anything except the base URL and auth header.
// Before (deprecated November 2024)
fetch('https://api.spotify.com/v1/audio-features/2WfaOiMkCvy7F5fcp2zZ8L', {
headers: { Authorization: 'Bearer <spotify_token>' }
})
// After — one-line change
fetch('https://api.tunelab.dev/v1/compat/spotify/audio-features/2WfaOiMkCvy7F5fcp2zZ8L', {
headers: { Authorization: 'Bearer tl_live_xxx' }
})
// Same JSON schema. Same field names. Real DSP, not cached metadata.