FeatureBeschreibung Einheit SpotifyMusicBrainzAcousticBrainzEssentiaDiscogsGeniusSecondHandSongs
Identification & Linking
Track / Recording Name d
0,00Search + Track endpoint
0,00Recording search
0,00returned in metadata.tags; no search - requires MusicBrainz Recording ID for lookup
0,00Nicht verfügbar
0,00release tracklist; track title + position
0,00search endpoint; song title + full_title
0,00performance and work search
ISRCInternational Standard Recording Code d
0,00deprecated since Nov 2024 for new apps
0,00Recording lookup with inc=isrcs; not always populated
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00not tracked in Discogs
0,00Nicht verfügbar
0,00Nicht verfügbar
ISWCInternational Standard Musical Work Code d
0,00Nicht verfügbar
0,00Work lookup; well maintained
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Spotify LinkURI/URL to the track on Spotify d
0,00external_urls.spotify
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
MusicBrainz IDsRecording ID, Work ID, Artist ID d
0,00Nicht verfügbar
0,00Recording, Work, Artist each via lookup
0,00uses MusicBrainz Recording ID as primary lookup key
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00MusicBrainz Work - SHS cross-references via MB URL-Work relationship
Artist
Artist Name + ID d
0,00SimplifiedArtistObject on Track
0,00Artist Credit with aliases
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00artist name + Discogs artist ID; extensive alias handling
0,00artist endpoint; Genius artist ID
0,00artist search and lookup; SHS artist ID
Artist Images d
0,00Artist endpoint returns images in various sizes
0,00no image hosting; possibly via Wikidata/Commons
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00requires authentication; images are Restricted Data (not CC0)
0,00artist image_url in API response
0,00Nicht verfügbar
Album / Release
Album Name + Typename, album/single/compilation d
0,00album.name + album.album_type
0,00Release + Release Group
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00release title + format (Vinyl/CD/Digital); master release groups versions
0,00album field on song objects; limited album detail
0,00release data available (albums/singles containing performances)
Release Date d
0,00release_date + precision (year, month, day)
0,00distinguishes original release from reissue; higher quality
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00year (sometimes month/day); country-specific releases tracked
0,00release_date on song objects
0,00performance/release dates; distinguishes originals from covers
Album Cover Art d
0,003 sizes: 640, 300, 64 px
0,00via Cover Art Archive (separate service)
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00release images; requires authentication; Restricted Data
0,00song_art_image_url and header_image_url
0,00Nicht verfügbar
Audio Metadata
DurationTrack length in milliseconds d
0,00duration_ms
0,00length (ms)
0,00metadata.audio_properties.length
0,00computable from audio file
0,00tracklist includes duration as formatted string (e.g. 3:32)
0,00Nicht verfügbar
0,00Nicht verfügbar
KeyPitch class (C/C#/D/...) d
0,00Audio Features deprecated Nov 2024
0,00Work attribute "Key"; rarely populated (mostly classical)
0,00tonal.key_key + key_strength; per Recording MBID
0,00KeyExtractor; reliable
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
ModeMajor / Minor d
0,00Audio Features deprecated Nov 2024
0,00included in Key attribute (e.g. "C major")
0,00tonal.key_scale (major/minor)
0,00included in KeyExtractor
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Tempo (BPM)Beats per minute d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00rhythm.bpm; per Recording MBID
0,00RhythmExtractor2013; reliable
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Time Signature3/4, 4/4, 6/8 etc. d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00RhythmExtractor; less reliable than tempo
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Audio Analysis
Energy0.0–1.0; intensity, loudness d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00no direct equivalent
0,00related descriptors (no exact 1:1 equivalent)
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Danceability0.0–1.0; rhythm regularity, beat strength d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00highlevel.danceability + rhythm.danceability
0,00Danceability extractor available
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Valence (Mood)0.0–1.0; positive vs. negative d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00mood classifiers: mood_happy, mood_sad, mood_party, mood_relaxed (different format than Spotify valence)
0,00no direct equivalent in Essentia
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Acousticness0.0–1.0; acoustic vs. electronic d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00highlevel.mood_acoustic
0,00spectral descriptors
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Instrumentalness0.0–1.0; absence of vocals d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00highlevel.voice_instrumental
0,00voice/instrumental classifier
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Liveness0.0–1.0; audience audible d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00audience detection possible
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Speechiness0.0–1.0; spoken words d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00speech/music classifier
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
LoudnessAverage in dB; -60 to 0 d
0,00Audio Features deprecated Nov 2024
0,00Nicht verfügbar
0,00lowlevel.average_loudness + replay_gain
0,00Loudness extractor
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
Additional Music Data
Genre / Tags d
0,00Artist genres deprecated Nov 2024
0,00folksonomy tags; community-curated
0,00highlevel genre classifiers (rosamerica, dortmund, electronic)
0,00genre classification
0,00extensive genre + style taxonomy; community-curated; very granular
0,00not a primary focus; tag system not exposed via API
0,00Nicht verfügbar
Songwriter CreditsComposers and lyricists d
0,00Nicht verfügbar
0,00Work → Artist relations with roles
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Written-By credits in extraartists; CC0 data
0,00structured writer + producer credits; key strength of Genius
0,00works include songwriter/composer information
Cover VersionsWho has covered this piece? d
0,00Nicht verfügbar
0,00Recording → Work → other recordings
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00master releases group pressings not covers
0,00Nicht verfügbar
0,00core feature of SecondHandSongs
Language d
0,00Nicht verfügbar
0,00Work attribute; ISO 639
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
LyricsSong text / lyrics d
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00API returns metadata + annotations only; full lyrics require web scraping (lyricsgenius); commercial license required
0,00Nicht verfügbar
Collecting Society IDsGEMA, ASCAP, BMI, SACEM etc. d
0,00Nicht verfügbar
0,00Work attributes; extensive (GEMA, ASCAP, BMI, SACEM, JASRAC etc.)
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
0,00Nicht verfügbar
API Access & Limits
Auth Model d
0,00OAuth 2.0 Client Credentials; free; token valid 1h
0,00no auth required for reads; User-Agent header mandatory
0,00no auth; lookup by MusicBrainz Recording ID
0,00local library; no auth needed
0,00OAuth 1.0a or key/secret or personal token; free registration
0,00OAuth2; free client token for read-only; commercial use requires license
0,00API key required; must apply and be approved; API in beta
Rate Limits d
0,00rolling 30s window; no published exact limit
0,001 req/sec; well documented
0,00no published limit; reasonable use expected
0,00no rate limit (local)
0,0060 req/min authenticated; 25 req/min unauthenticated
0,00not publicly documented; reportedly generous for non-commercial use
0,00not publicly documented; beta API
Cost d
0,00free for development mode (max 5 users)
0,00free; open data (CC0 for data + CC BY-NC-SA for db)
0,00free; CC0 licensed data
0,00open source (AGPLv3)
0,00free; commercial use generally permitted under TOU
0,00free for non-commercial; commercial license required
0,00free; community-supported
Bulk AccessData dumps or batch endpoints d
0,00no bulk export; paged results only
0,00full data dumps available (updated regularly)
0,00full data dumps available (CC0); 29M+ recordings
0,00batch processing of local files
0,00monthly XML data dumps under CC0; 16M+ releases
0,00no data dumps; paged API results only
0,00academic dataset (SHS100k via Million Song Dataset); no full dump
Response Format d
0,00JSON REST API
0,00JSON or XML; REST API
0,00JSON REST API; low-level + high-level endpoints
0,00Python/C++ library; returns structured objects
0,00JSON REST API v2.0; JSONP support
0,00JSON REST API; supports plain/html/dom text formats
0,00JSON REST API (beta)
Data Quality & Coverage
Community-curated Data d
0,00algorithmic + label-submitted
0,00extensive community curation; editorial guidelines, peer review
0,00crowd-sourced via Essentia extractors; 29M+ submissions
0,00algorithmic (ML models)
0,00massive collector community; strong editorial guidelines
0,00large community of lyric contributors and annotators
0,00community-curated cover song database; editorial oversight
Catalog Coverage d
0,00100M+ tracks; strongest for post-2000 commercial releases
0,0060M+ recordings; strong across eras, especially deep catalog
0,0029M+ recordings; strong for popular music catalog
0,00depends on available audio files
0,0016M+ releases; strongest for physical releases (vinyl/CD)
0,00extensive lyrics catalog; strongest for English-language popular music
0,001M+ covers of 100k+ works; niche but deep for cover songs
Risk & Sustainability
Deprecation Risk d
0,00high; multiple endpoints deprecated Nov 2024; Extended Quota requires 250k MAU
0,00low; open data project backed by MetaBrainz Foundation
0,00project ended 2022; API still online but will shut down; bulk download recommended
0,00low; open source project by MTG/UPF Barcelona
0,00low; stable platform since 2000; commercially viable (marketplace revenue)
0,00low; well-funded platform (MediaLab AI subsidiary)
0,00moderate; API in beta for years; small community project
Open Source / Open Data d
0,00proprietary; closed data
0,00open data (CC0); open source server
0,00CC0 licensed data; full dumps available
0,00open source (AGPLv3)
0,00core catalog data CC0; images restricted; monthly XML dumps available
0,00proprietary; commercial license required for data use
0,00academic datasets available; API license terms apply; not fully open
Vendor Lock-in d
0,00Spotify IDs only usable within Spotify ecosystem
0,00standard identifiers (ISRC/ISWC); linked open data
0,00uses MusicBrainz Recording IDs; CC0 data exportable
0,00no lock-in; runs locally
0,00Discogs-specific IDs; but core data CC0 and exportable
0,00Genius-specific IDs; proprietary data; commercial license terms
0,00SHS IDs cross-linked with MusicBrainz; data partially exportable