XIM Grid · measured 25 Oct 2026
Ground truth for beat, tempo, key and structure
Beat and downbeat sets are tapped by annotators; here the tempo map, time signature and key come from the session itself, section markers where the producer set them, with the isolated drum lanes as a clean onset reference.
Each song comes with
- grid.json: tempo map, time signatures, key, and the section markers where the producer set them (about four in ten Ableton sets, fewer in FL Studio), each with bar, beat and seconds and the source of the field
- the drum lanes and mix.wav
- a cross-check against the audio analyser's key and tempo, with confidence
Built from
- Stems Every lane of a finished song, printed by the producer from the session it was made in.
- Paired production sets One song, everything that made it: the producer's session, every lane printed from it, the MIDI it played, and the flat and the mastered master.
- DAW sessions The producer's project file with its audio and MIDI, as it was when the track was finished.
How it ships
Readiness: ships within 10 working days of payment; the labels file is built per delivery from the parsed project. Delivery to a private S3 prefix or your bucket, with a manifest, checksums, creator-level splits and a datasheet.
Loader: one JSON record per song beside the audio.
Rights
Every creator in this set accepted terms that name AI training. Every stem is printed from the creator's own session, part by part, and the manifest says which session it came from. Read the rights page.