- Meta music database sites:
- Themefinder
- RISM Online
- IMSLP / Petrucci Music Library
- Choral Public Domain Library
- Museopen
- Aria
- MIDI databases, e.g.:
- Million Song Dataset, Lakh MIDI Dataset, Slakh Dataset
- McGill Billboard Dataset
- ASAP: Aligned Scores and Performances
- Online music stores (e.g., Grooveshark, iTunes, Rhapsody, Spotify, Pandora, Rdio, etc.) (a review fron 2014)
- Early Music
- Musedata
- Musipedia
- C-BRAHMS
- MetaBrainz Databases
- Discogs API
- SecondHandSongs API
- setlist.fm
- Wikipedia / DBpedia (2018: 123,000 2022: 158,895 music albums) / Wikidata (music metadata)
- MusicMoz
- MTG-Jamendo Dataset
- Freesounds (363,000 sounds / 5,000 hours); FSD50K (annotated Freesounds: 51,197 clips)
- FMA (Free Music Archive)
- Google / Magenta
- Dig That Lick
- Weimar Jazz Database
- Wagner Ring Dataset
- Mulltitrack Datasets:
- MusicNet (330 freely licensed classical music recordings with every note labeled)
- CompMusic (non-Western music)
- IRMAS: a dataset for instrument recognition in musical audio signals
- Commercial databases:
- Lyrics
- Visualizations
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