Paired sets · measured 18 Oct 2026
Paired production sets Terms signed
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.
What you get per song: the project as the producer saved it, one WAV per lane printed from that project with its plugins loaded, the MIDI the session played, the unmastered mix, and the mastered master where one was made. Four views of one piece of music, from one file.
Because every part comes from the same project, they line up sample for sample: the lanes sum to the mix, the MIDI matches the lanes it drove, and the arrangement in the project is the arrangement you hear. No separation model touched any of it, so the lanes have no bleed.
That is the pairing an automatic mixing or mastering model needs, and the symbolic to audio pairing a transcription or synthesis model needs, with the end state of the session as ground truth.
Inside the numbers
What each song comes with
- The project and every lane printed from it: all 2,172 songs.
- The flat master, the unmastered mix as the session renders it: all 2,172 songs.
- MIDI from the session: 2,118 of 2,172 songs, 14,019 files.
- A mastered master as well: 163 of 2,172 songs.
DAW
Genres
Tempo
63 to 195 BPM, median 124.
Keys
932 major, 1,013 minor.
Formats
.logicx, .als, .wav, .mid
What a delivery contains
One folder per song: the project zipped, one WAV per lane, the MIDI folder where the session had notes, the flat master and the mastered master where it exists, with the manifest row. Prepared per request.
Manifest fields: song_id, creator_id, daw, bpm, key, lanes, midi_files, has_mastered, duration.
| song_id | creator_id | daw | bpm | key | lanes | midi_files | has_mastered | duration |
|---|---|---|---|---|---|---|---|---|
| s-4e1 | c-2a7 | Logic | 124 | Fm | 28 | 6 | false | 5:12 |
Rights for this dataset
Every creator in this set accepted terms that name AI training. Every part comes from the creator's own session, and the manifest says which session it came from. Read the rights page.
Often requested with
- Stems Every lane of a finished song, printed by the producer from the session it was made in.
- DAW sessions The producer's project file with its audio and MIDI, as it was when the track was finished.
- MIDI files Note data from sessions and MIDI packs: chords, leads, basslines, drums.