Enhanced Metadata Event Schema
Changes to the Schema
Should the schema change, notice will be given and sent out via MassiveMusic maintenance page here. We recommend not mapping to the schema to avoid any potential changes being breaking.
OpenAPI Schema
All dates and times are provided in ISO 8601 format.
{
"openapi": "3.0.2",
"info": {
"title": "Enhanced Metadata",
"version": "1.0"
},
"paths": {},
"components": {
"schemas": {
"enhancedMetadataEvent": {
"type": "array",
"minItems": 1,
"items": {
"$ref": "#/components/schemas/enhancedMetadata"
}
},
"enhancedMetadata": {
"type": "object",
"description": "Enhanced metadata for a track",
"minProperties": 15,
"maxProperties": 15,
"properties": {
"version": {
"type": "integer",
"format": "int64",
"description": "Integer representation of the current version of the included enhanced metadata tags"
},
"releaseId": {
"type": "integer",
"format": "int32",
"description": "The ID of the associated release"
},
"trackId": {
"type": "integer",
"format": "int32",
"description": "The ID of the associated track"
},
"embedding": {
"type": "array",
"minItems": 768,
"maxItems": 768,
"description": "A 768-dimension vector representing the sonic essence of the track",
"items": {
"type": "number"
}
},
"content": {
"type": "object",
"description": "Whether the track is music or not",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted content class, always one returned",
"$ref": "#/components/schemas/contentEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each content class",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"music": {
"$ref": "#/components/schemas/probabilityScore"
},
"no-music": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"genre": {
"type": "object",
"description": "The main and sub genre of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"main": {
"type": "object",
"description": "The main genre(s) of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted main genre classes in descending order, up to 3 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/genresEnum"
},
"minItems": 1,
"maxItems": 3
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each main genre class",
"minProperties": 16,
"maxProperties": 16,
"properties": {
"ambient": {
"$ref": "#/components/schemas/probabilityScore"
},
"blues": {
"$ref": "#/components/schemas/probabilityScore"
},
"country": {
"$ref": "#/components/schemas/probabilityScore"
},
"electronic": {
"$ref": "#/components/schemas/probabilityScore"
},
"folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"funk, soul and r&b": {
"$ref": "#/components/schemas/probabilityScore"
},
"hip hop": {
"$ref": "#/components/schemas/probabilityScore"
},
"jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"latin": {
"$ref": "#/components/schemas/probabilityScore"
},
"metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"orchestral, score and classical": {
"$ref": "#/components/schemas/probabilityScore"
},
"pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"reggae": {
"$ref": "#/components/schemas/probabilityScore"
},
"rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"spoken word": {
"$ref": "#/components/schemas/probabilityScore"
},
"world": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"sub": {
"type": "object",
"description": "The sub genre(s) of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted sub genre classes in descending order, up to 2 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/subGenresEnum"
},
"minItems": 1,
"maxItems": 2
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each sub genre class",
"minProperties": 135,
"maxProperties": 135,
"properties": {
"acapella": {
"$ref": "#/components/schemas/probabilityScore"
},
"acid jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"adult contemporary": {
"$ref": "#/components/schemas/probabilityScore"
},
"afro beats": {
"$ref": "#/components/schemas/probabilityScore"
},
"alternative hip hop": {
"$ref": "#/components/schemas/probabilityScore"
},
"alternative rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"ambient house": {
"$ref": "#/components/schemas/probabilityScore"
},
"american folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"arabian folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"audioplay": {
"$ref": "#/components/schemas/probabilityScore"
},
"baroque": {
"$ref": "#/components/schemas/probabilityScore"
},
"bebop": {
"$ref": "#/components/schemas/probabilityScore"
},
"black metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"bluegrass": {
"$ref": "#/components/schemas/probabilityScore"
},
"blues rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"boogie woogie": {
"$ref": "#/components/schemas/probabilityScore"
},
"boom bap": {
"$ref": "#/components/schemas/probabilityScore"
},
"bossa nova": {
"$ref": "#/components/schemas/probabilityScore"
},
"breakbeat": {
"$ref": "#/components/schemas/probabilityScore"
},
"chinese folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"chiptune": {
"$ref": "#/components/schemas/probabilityScore"
},
"choro": {
"$ref": "#/components/schemas/probabilityScore"
},
"classic blues": {
"$ref": "#/components/schemas/probabilityScore"
},
"classical period": {
"$ref": "#/components/schemas/probabilityScore"
},
"contemporary blues": {
"$ref": "#/components/schemas/probabilityScore"
},
"contemporary classical": {
"$ref": "#/components/schemas/probabilityScore"
},
"contemporary r&b": {
"$ref": "#/components/schemas/probabilityScore"
},
"cool jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"country pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"country rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"cumbia": {
"$ref": "#/components/schemas/probabilityScore"
},
"dance pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"dancehall": {
"$ref": "#/components/schemas/probabilityScore"
},
"death metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"deep ambient": {
"$ref": "#/components/schemas/probabilityScore"
},
"deep house": {
"$ref": "#/components/schemas/probabilityScore"
},
"disco": {
"$ref": "#/components/schemas/probabilityScore"
},
"disco house": {
"$ref": "#/components/schemas/probabilityScore"
},
"dixieland": {
"$ref": "#/components/schemas/probabilityScore"
},
"doo wop": {
"$ref": "#/components/schemas/probabilityScore"
},
"doom metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"drum and bass": {
"$ref": "#/components/schemas/probabilityScore"
},
"dub": {
"$ref": "#/components/schemas/probabilityScore"
},
"dubstep": {
"$ref": "#/components/schemas/probabilityScore"
},
"early funk": {
"$ref": "#/components/schemas/probabilityScore"
},
"easy listening": {
"$ref": "#/components/schemas/probabilityScore"
},
"electro house": {
"$ref": "#/components/schemas/probabilityScore"
},
"electro pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"electroclash": {
"$ref": "#/components/schemas/probabilityScore"
},
"electronica": {
"$ref": "#/components/schemas/probabilityScore"
},
"eurodance": {
"$ref": "#/components/schemas/probabilityScore"
},
"experimental electronic": {
"$ref": "#/components/schemas/probabilityScore"
},
"film score": {
"$ref": "#/components/schemas/probabilityScore"
},
"flamenco": {
"$ref": "#/components/schemas/probabilityScore"
},
"folk pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"folk rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"forró": {
"$ref": "#/components/schemas/probabilityScore"
},
"free jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"funk": {
"$ref": "#/components/schemas/probabilityScore"
},
"funk rap": {
"$ref": "#/components/schemas/probabilityScore"
},
"fusion": {
"$ref": "#/components/schemas/probabilityScore"
},
"garage rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"glam rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"gospel": {
"$ref": "#/components/schemas/probabilityScore"
},
"gothic rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"grime": {
"$ref": "#/components/schemas/probabilityScore"
},
"grind core": {
"$ref": "#/components/schemas/probabilityScore"
},
"grunge": {
"$ref": "#/components/schemas/probabilityScore"
},
"hard dance": {
"$ref": "#/components/schemas/probabilityScore"
},
"hard rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"heavy metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"honky tonk": {
"$ref": "#/components/schemas/probabilityScore"
},
"house": {
"$ref": "#/components/schemas/probabilityScore"
},
"idm": {
"$ref": "#/components/schemas/probabilityScore"
},
"indian folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"indie pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"indie rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"industrial techno": {
"$ref": "#/components/schemas/probabilityScore"
},
"irish folk": {
"$ref": "#/components/schemas/probabilityScore"
},
"latin jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"latin pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"lofi hip hop": {
"$ref": "#/components/schemas/probabilityScore"
},
"mariachi": {
"$ref": "#/components/schemas/probabilityScore"
},
"math rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"mersey beat": {
"$ref": "#/components/schemas/probabilityScore"
},
"metalcore": {
"$ref": "#/components/schemas/probabilityScore"
},
"neo soul": {
"$ref": "#/components/schemas/probabilityScore"
},
"new age": {
"$ref": "#/components/schemas/probabilityScore"
},
"new wave": {
"$ref": "#/components/schemas/probabilityScore"
},
"noise rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"nu funk": {
"$ref": "#/components/schemas/probabilityScore"
},
"nu metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"old school hip hop": {
"$ref": "#/components/schemas/probabilityScore"
},
"old school soul": {
"$ref": "#/components/schemas/probabilityScore"
},
"pop punk": {
"$ref": "#/components/schemas/probabilityScore"
},
"pop rap": {
"$ref": "#/components/schemas/probabilityScore"
},
"pop rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"post hardcore": {
"$ref": "#/components/schemas/probabilityScore"
},
"post metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"post punk": {
"$ref": "#/components/schemas/probabilityScore"
},
"post rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"progressive metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"progressive rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"psychedelic rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"psytrance": {
"$ref": "#/components/schemas/probabilityScore"
},
"punk": {
"$ref": "#/components/schemas/probabilityScore"
},
"ragtime": {
"$ref": "#/components/schemas/probabilityScore"
},
"reggaeton": {
"$ref": "#/components/schemas/probabilityScore"
},
"renaissance": {
"$ref": "#/components/schemas/probabilityScore"
},
"rhythm and blues": {
"$ref": "#/components/schemas/probabilityScore"
},
"rock'n'roll": {
"$ref": "#/components/schemas/probabilityScore"
},
"romanticism": {
"$ref": "#/components/schemas/probabilityScore"
},
"roots reggae": {
"$ref": "#/components/schemas/probabilityScore"
},
"salsa": {
"$ref": "#/components/schemas/probabilityScore"
},
"samba": {
"$ref": "#/components/schemas/probabilityScore"
},
"sertanejo": {
"$ref": "#/components/schemas/probabilityScore"
},
"shoegaze": {
"$ref": "#/components/schemas/probabilityScore"
},
"ska": {
"$ref": "#/components/schemas/probabilityScore"
},
"ska punk": {
"$ref": "#/components/schemas/probabilityScore"
},
"smooth jazz": {
"$ref": "#/components/schemas/probabilityScore"
},
"soul": {
"$ref": "#/components/schemas/probabilityScore"
},
"stoner rock": {
"$ref": "#/components/schemas/probabilityScore"
},
"swing": {
"$ref": "#/components/schemas/probabilityScore"
},
"symphonic metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"synth pop": {
"$ref": "#/components/schemas/probabilityScore"
},
"synthwave": {
"$ref": "#/components/schemas/probabilityScore"
},
"tango": {
"$ref": "#/components/schemas/probabilityScore"
},
"tech house": {
"$ref": "#/components/schemas/probabilityScore"
},
"techno": {
"$ref": "#/components/schemas/probabilityScore"
},
"thrash metal": {
"$ref": "#/components/schemas/probabilityScore"
},
"trance": {
"$ref": "#/components/schemas/probabilityScore"
},
"trap": {
"$ref": "#/components/schemas/probabilityScore"
},
"trip hop": {
"$ref": "#/components/schemas/probabilityScore"
},
"urban": {
"$ref": "#/components/schemas/probabilityScore"
},
"volksmusik": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"mood": {
"type": "object",
"description": "The mood(s) of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted mood classes in descending order, up to 3 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/moodsEnum"
},
"minItems": 1,
"maxItems": 3
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each mood class",
"minProperties": 22,
"maxProperties": 22,
"properties": {
"aggressive": {
"$ref": "#/components/schemas/probabilityScore"
},
"calm": {
"$ref": "#/components/schemas/probabilityScore"
},
"confident": {
"$ref": "#/components/schemas/probabilityScore"
},
"dark": {
"$ref": "#/components/schemas/probabilityScore"
},
"dreamy": {
"$ref": "#/components/schemas/probabilityScore"
},
"driving": {
"$ref": "#/components/schemas/probabilityScore"
},
"energetic": {
"$ref": "#/components/schemas/probabilityScore"
},
"epic": {
"$ref": "#/components/schemas/probabilityScore"
},
"exciting": {
"$ref": "#/components/schemas/probabilityScore"
},
"happy": {
"$ref": "#/components/schemas/probabilityScore"
},
"hopeful": {
"$ref": "#/components/schemas/probabilityScore"
},
"nostalgic": {
"$ref": "#/components/schemas/probabilityScore"
},
"reflective": {
"$ref": "#/components/schemas/probabilityScore"
},
"restless": {
"$ref": "#/components/schemas/probabilityScore"
},
"romantic": {
"$ref": "#/components/schemas/probabilityScore"
},
"sad": {
"$ref": "#/components/schemas/probabilityScore"
},
"scary": {
"$ref": "#/components/schemas/probabilityScore"
},
"sexy": {
"$ref": "#/components/schemas/probabilityScore"
},
"tender": {
"$ref": "#/components/schemas/probabilityScore"
},
"uplifting": {
"$ref": "#/components/schemas/probabilityScore"
},
"warm": {
"$ref": "#/components/schemas/probabilityScore"
},
"whimsical": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"emotion": {
"type": "object",
"description": "The emotional characteristics of the track",
"minProperties": 4,
"maxProperties": 4,
"properties": {
"arousal": {
"type": "object",
"description": "The level of activation elicited by the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted arousal class, always one returned",
"$ref": "#/components/schemas/arousalEnum"
},
"value": {
"description": "Interval-scale arousal score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"valence": {
"type": "object",
"description": "The level of positivity or negativity elicited by the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted valence class, always one returned",
"$ref": "#/components/schemas/valenceEnum"
},
"value": {
"description": "Interval-scale valence score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"engagement": {
"type": "object",
"description": "The level of involvement or attention elicited by the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted engagement class, always one returned",
"$ref": "#/components/schemas/engagementEnum"
},
"value": {
"description": "Interval-scale engagement score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"pleasantness": {
"type": "object",
"description": "The level of enjoyment or satisfaction elicited by the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted pleasantness class, always one returned",
"$ref": "#/components/schemas/pleasantnessEnum"
},
"value": {
"description": "Interval-scale pleasantness score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
}
}
},
"instrumentation": {
"type": "object",
"description": "The instrumentation details of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"vocals": {
"type": "object",
"description": "The vocal characteristics of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted vocal class, always one returned",
"$ref": "#/components/schemas/vocalsEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each vocal class",
"minProperties": 5,
"maxProperties": 5,
"properties": {
"mixed vocals": {
"$ref": "#/components/schemas/probabilityScore"
},
"male vocals": {
"$ref": "#/components/schemas/probabilityScore"
},
"female vocals": {
"$ref": "#/components/schemas/probabilityScore"
},
"choir": {
"$ref": "#/components/schemas/probabilityScore"
},
"instrumental": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"instruments": {
"type": "object",
"description": "The prominent instrument(s) in the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted prominent instrument classes in descending order, up to 3 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/instrumentsEnum"
},
"minItems": 1,
"maxItems": 3
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each prominent instrument class",
"minProperties": 19,
"maxProperties": 19,
"properties": {
"acoustic bass": {
"$ref": "#/components/schemas/probabilityScore"
},
"acoustic drums": {
"$ref": "#/components/schemas/probabilityScore"
},
"acoustic guitar": {
"$ref": "#/components/schemas/probabilityScore"
},
"brass": {
"$ref": "#/components/schemas/probabilityScore"
},
"dj equipment": {
"$ref": "#/components/schemas/probabilityScore"
},
"electric bass": {
"$ref": "#/components/schemas/probabilityScore"
},
"electric guitar": {
"$ref": "#/components/schemas/probabilityScore"
},
"electronic drums": {
"$ref": "#/components/schemas/probabilityScore"
},
"free reed": {
"$ref": "#/components/schemas/probabilityScore"
},
"harp": {
"$ref": "#/components/schemas/probabilityScore"
},
"non-western folk strings": {
"$ref": "#/components/schemas/probabilityScore"
},
"orchestral strings": {
"$ref": "#/components/schemas/probabilityScore"
},
"percussion": {
"$ref": "#/components/schemas/probabilityScore"
},
"piano": {
"$ref": "#/components/schemas/probabilityScore"
},
"saxophone": {
"$ref": "#/components/schemas/probabilityScore"
},
"synthesizer": {
"$ref": "#/components/schemas/probabilityScore"
},
"vocals": {
"$ref": "#/components/schemas/probabilityScore"
},
"western folk strings": {
"$ref": "#/components/schemas/probabilityScore"
},
"woodwinds": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"sound": {
"type": "object",
"description": "The sound characteristics of the track",
"minProperties": 7,
"maxProperties": 7,
"properties": {
"recordingEnvironment": {
"type": "object",
"description": "The recording environment of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted recording environment class, always one returned",
"$ref": "#/components/schemas/recordingEnvironmentsEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each recording environment class",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"live": {
"$ref": "#/components/schemas/probabilityScore"
},
"studio": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"soundGeneration": {
"type": "object",
"description": "The dominant method of sound generation of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted sound generation class, always one returned",
"$ref": "#/components/schemas/soundGenerationEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each sound generation class",
"minProperties": 3,
"maxProperties": 3,
"properties": {
"acoustic": {
"$ref": "#/components/schemas/probabilityScore"
},
"electric": {
"$ref": "#/components/schemas/probabilityScore"
},
"synthetic": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"loudness": {
"type": "object",
"description": "The overall loudness of the track according to the ITU-R BS.1770-4 recommendation",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted loudness class, always one returned",
"$ref": "#/components/schemas/loudnessEnum"
},
"value": {
"description": "Interval-scale loudness score in LKFS for the track in the range -100 to 0",
"$ref": "#/components/schemas/loudnessScore"
}
}
},
"roughness": {
"type": "object",
"description": "The perceived amount of irregular amplitude fluctuations in the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted roughness class, always one returned",
"$ref": "#/components/schemas/roughnessEnum"
},
"value": {
"description": "Interval-scale roughness score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"timbre": {
"type": "object",
"description": "The tonal quality or color of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted timbre class, always one returned",
"$ref": "#/components/schemas/timbreEnum"
},
"value": {
"description": "Interval-scale timbre score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"space": {
"type": "object",
"description": "The perceived spatial characteristics of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted space class, always one returned",
"$ref": "#/components/schemas/spaceEnum"
},
"value": {
"description": "Interval-scale space score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"texture": {
"type": "object",
"description": "The overall density and layering of sounds in the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted texture class, always one returned",
"$ref": "#/components/schemas/textureEnum"
},
"value": {
"description": "Interval-scale texture score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
}
}
},
"harmonics": {
"type": "object",
"description": "The harmonic characteristics of the track",
"minProperties": 4,
"maxProperties": 4,
"properties": {
"harmony": {
"type": "object",
"description": "The harmonic character of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted harmony class, always one returned",
"$ref": "#/components/schemas/harmonyEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each harmony class",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"consonant": {
"$ref": "#/components/schemas/probabilityScore"
},
"dissonant": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"scale": {
"type": "object",
"description": "The tonal framework of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted scale class, always one returned",
"$ref": "#/components/schemas/scaleEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each scale class",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"minor key": {
"$ref": "#/components/schemas/probabilityScore"
},
"major key": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"key": {
"type": "object",
"description": "The root note around which the track is centered",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted key class, always one returned",
"$ref": "#/components/schemas/keyEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each key class",
"minProperties": 12,
"maxProperties": 12,
"properties": {
"c": {
"$ref": "#/components/schemas/probabilityScore"
},
"c#": {
"$ref": "#/components/schemas/probabilityScore"
},
"d": {
"$ref": "#/components/schemas/probabilityScore"
},
"d#": {
"$ref": "#/components/schemas/probabilityScore"
},
"e": {
"$ref": "#/components/schemas/probabilityScore"
},
"f": {
"$ref": "#/components/schemas/probabilityScore"
},
"f#": {
"$ref": "#/components/schemas/probabilityScore"
},
"g": {
"$ref": "#/components/schemas/probabilityScore"
},
"g#": {
"$ref": "#/components/schemas/probabilityScore"
},
"a": {
"$ref": "#/components/schemas/probabilityScore"
},
"a#": {
"$ref": "#/components/schemas/probabilityScore"
},
"b": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"tonality": {
"type": "object",
"description": "The overall melodic and tonal coherence of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted tonality class, always one returned",
"$ref": "#/components/schemas/tonalityEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each tonality class",
"minProperties": 4,
"maxProperties": 4,
"properties": {
"atonal": {
"$ref": "#/components/schemas/probabilityScore"
},
"melodious": {
"$ref": "#/components/schemas/probabilityScore"
},
"moderate melodiousness": {
"$ref": "#/components/schemas/probabilityScore"
},
"monotonous": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"rhythmics": {
"type": "object",
"description": "The rhythmic characteristics of the track",
"minProperties": 4,
"maxProperties": 4,
"properties": {
"rhythm": {
"type": "object",
"description": "The main rhythmic structure and timing pattern of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted rhythm class, always one returned",
"$ref": "#/components/schemas/rhythmEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each rhythm class",
"minProperties": 3,
"maxProperties": 3,
"properties": {
"common time": {
"$ref": "#/components/schemas/probabilityScore"
},
"complex time": {
"$ref": "#/components/schemas/probabilityScore"
},
"triplets": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"grooviness": {
"type": "object",
"description": "The rhythmic feel of the track that creates the urge to move",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted grooviness class, always one returned",
"$ref": "#/components/schemas/groovinessEnum"
},
"value": {
"description": "Interval-scale grooviness score for the track in the range -1 to 1",
"$ref": "#/components/schemas/bipolarScore"
}
}
},
"tempo": {
"type": "object",
"description": "The speed or pace of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted tempo class, always one returned",
"$ref": "#/components/schemas/tempoEnum"
},
"distribution": {
"type": "object",
"description": "Ordinal score distribution between 0 and 1 for each tempo class",
"minProperties": 3,
"maxProperties": 3,
"properties": {
"slow": {
"$ref": "#/components/schemas/probabilityScore"
},
"mid-tempo": {
"$ref": "#/components/schemas/probabilityScore"
},
"fast": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"bpm": {
"type": "object",
"description": "The beats per minute of the track",
"minProperties": 1,
"maxProperties": 1,
"properties": {
"value": {
"description": "BPM value for the track",
"$ref": "#/components/schemas/bpmScore"
}
}
}
}
},
"audience": {
"type": "object",
"description": "The audience characteristics of the track",
"minProperties": 3,
"maxProperties": 3,
"properties": {
"age": {
"type": "object",
"description": "The audience age group(s) most likely to resonate with the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted audience age-group classes in descending order, up to 3 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/audienceAgeEnum"
},
"minItems": 1,
"maxItems": 3
},
"distribution": {
"type": "object",
"description": "Ordinal score distribution between 0 and 1 for each audience age-group class",
"minProperties": 6,
"maxProperties": 6,
"properties": {
"generation z": {
"$ref": "#/components/schemas/probabilityScore"
},
"younger generation y": {
"$ref": "#/components/schemas/probabilityScore"
},
"older generation y": {
"$ref": "#/components/schemas/probabilityScore"
},
"generation x": {
"$ref": "#/components/schemas/probabilityScore"
},
"younger generation b": {
"$ref": "#/components/schemas/probabilityScore"
},
"older generation b": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"gender": {
"type": "object",
"description": "The audience gender identity most likely to resonate with the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted audience gender class, always one returned",
"$ref": "#/components/schemas/audienceGenderEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each audience gender class",
"minProperties": 3,
"maxProperties": 3,
"properties": {
"diverse": {
"$ref": "#/components/schemas/probabilityScore"
},
"female": {
"$ref": "#/components/schemas/probabilityScore"
},
"male": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"region": {
"type": "object",
"description": "The audience geographical region(s) most likely to resonate with the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted audience region classes in descending order, up to 3 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/audienceRegionEnum"
},
"minItems": 1,
"maxItems": 3
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each audience region class",
"minProperties": 12,
"maxProperties": 12,
"properties": {
"australia and new zealand": {
"$ref": "#/components/schemas/probabilityScore"
},
"central america and the caribbean": {
"$ref": "#/components/schemas/probabilityScore"
},
"central and southern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"eastern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"eastern europe": {
"$ref": "#/components/schemas/probabilityScore"
},
"northern africa and western asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"northern america": {
"$ref": "#/components/schemas/probabilityScore"
},
"south america": {
"$ref": "#/components/schemas/probabilityScore"
},
"south-eastern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"southern europe": {
"$ref": "#/components/schemas/probabilityScore"
},
"sub-saharan africa": {
"$ref": "#/components/schemas/probabilityScore"
},
"western and northern europe": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"origin": {
"type": "object",
"description": "The origin characteristics of the track",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"decade": {
"type": "object",
"description": "The decade the track's musical and sound characteristics reflect",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted origin decade class, always one returned",
"$ref": "#/components/schemas/originDecadeEnum"
},
"distribution": {
"type": "object",
"description": "Ordinal score distribution between 0 and 1 for each origin decade class",
"minProperties": 9,
"maxProperties": 9,
"properties": {
"pre-1950s": {
"$ref": "#/components/schemas/probabilityScore"
},
"1950s": {
"$ref": "#/components/schemas/probabilityScore"
},
"1960s": {
"$ref": "#/components/schemas/probabilityScore"
},
"1970s": {
"$ref": "#/components/schemas/probabilityScore"
},
"1980s": {
"$ref": "#/components/schemas/probabilityScore"
},
"1990s": {
"$ref": "#/components/schemas/probabilityScore"
},
"2000s": {
"$ref": "#/components/schemas/probabilityScore"
},
"2010s": {
"$ref": "#/components/schemas/probabilityScore"
},
"2020s": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
},
"region": {
"type": "object",
"description": "The geographic region a track's musical style and characteristics are most closely associated with",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"label": {
"type": "string",
"description": "Predicted origin region class, always one returned",
"$ref": "#/components/schemas/originRegionEnum"
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each origin region class",
"minProperties": 12,
"maxProperties": 12,
"properties": {
"australia and new zealand": {
"$ref": "#/components/schemas/probabilityScore"
},
"central america and the caribbean": {
"$ref": "#/components/schemas/probabilityScore"
},
"central and southern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"eastern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"eastern europe": {
"$ref": "#/components/schemas/probabilityScore"
},
"northern africa and western asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"northern america": {
"$ref": "#/components/schemas/probabilityScore"
},
"south america": {
"$ref": "#/components/schemas/probabilityScore"
},
"south-eastern asia": {
"$ref": "#/components/schemas/probabilityScore"
},
"southern europe": {
"$ref": "#/components/schemas/probabilityScore"
},
"sub-saharan africa": {
"$ref": "#/components/schemas/probabilityScore"
},
"western and northern europe": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"useCase": {
"type": "object",
"description": "The most suitable contexts for the track's use",
"minProperties": 2,
"maxProperties": 2,
"properties": {
"labels": {
"type": "array",
"description": "Predicted use case classes in descending order, up to 2 returned if above the confidence threshold",
"items": {
"type": "string",
"$ref": "#/components/schemas/useCaseEnum"
},
"minItems": 1,
"maxItems": 2
},
"distribution": {
"type": "object",
"description": "Nominal score distribution between 0 and 1 for each use case class",
"minProperties": 15,
"maxProperties": 15,
"properties": {
"background": {
"$ref": "#/components/schemas/probabilityScore"
},
"celebrations": {
"$ref": "#/components/schemas/probabilityScore"
},
"christmas": {
"$ref": "#/components/schemas/probabilityScore"
},
"cooking & eating": {
"$ref": "#/components/schemas/probabilityScore"
},
"extreme sports": {
"$ref": "#/components/schemas/probabilityScore"
},
"gaming": {
"$ref": "#/components/schemas/probabilityScore"
},
"halloween": {
"$ref": "#/components/schemas/probabilityScore"
},
"party": {
"$ref": "#/components/schemas/probabilityScore"
},
"relaxation/meditation": {
"$ref": "#/components/schemas/probabilityScore"
},
"roadtrip": {
"$ref": "#/components/schemas/probabilityScore"
},
"study/work": {
"$ref": "#/components/schemas/probabilityScore"
},
"summer": {
"$ref": "#/components/schemas/probabilityScore"
},
"valentine's day": {
"$ref": "#/components/schemas/probabilityScore"
},
"winter": {
"$ref": "#/components/schemas/probabilityScore"
},
"workout/fitness": {
"$ref": "#/components/schemas/probabilityScore"
}
}
}
}
}
}
},
"probabilityScore": {
"type": "number",
"description": "A normalized score between 0 and 1",
"minimum": 0,
"maximum": 1
},
"bipolarScore": {
"type": "number",
"description": "A score ranging from -1 to 1",
"minimum": -1,
"maximum": 1
},
"loudnessScore": {
"type": "number",
"description": "Loudness in LKFS ranging from -100 to 0",
"minimum": -100,
"maximum": 0
},
"bpmScore": {
"type": "number",
"description": "Beats Per Minute",
"minimum": 0
},
"contentEnum": {
"type": "string",
"enum": [
"music",
"no-music"
]
},
"genresEnum": {
"type": "string",
"enum": [
"ambient",
"blues",
"country",
"electronic",
"folk",
"funk, soul and r&b",
"hip hop",
"jazz",
"latin",
"metal",
"orchestral, score and classical",
"pop",
"reggae",
"rock",
"spoken word",
"world"
]
},
"subGenresEnum": {
"type": "string",
"enum": [
"acapella",
"acid jazz",
"adult contemporary",
"afro beats",
"alternative hip hop",
"alternative rock",
"ambient house",
"american folk",
"arabian folk",
"audioplay",
"baroque",
"bebop",
"black metal",
"bluegrass",
"blues rock",
"boogie woogie",
"boom bap",
"bossa nova",
"breakbeat",
"chinese folk",
"chiptune",
"choro",
"classic blues",
"classical period",
"contemporary blues",
"contemporary classical",
"contemporary r&b",
"cool jazz",
"country pop",
"country rock",
"cumbia",
"dance pop",
"dancehall",
"death metal",
"deep ambient",
"deep house",
"disco",
"disco house",
"dixieland",
"doo wop",
"doom metal",
"drum and bass",
"dub",
"dubstep",
"early funk",
"easy listening",
"electro house",
"electro pop",
"electroclash",
"electronica",
"eurodance",
"experimental electronic",
"film score",
"flamenco",
"folk pop",
"folk rock",
"forró",
"free jazz",
"funk",
"funk rap",
"fusion",
"garage rock",
"glam rock",
"gospel",
"gothic rock",
"grime",
"grind core",
"grunge",
"hard dance",
"hard rock",
"heavy metal",
"honky tonk",
"house",
"idm",
"indian folk",
"indie pop",
"indie rock",
"industrial techno",
"irish folk",
"latin jazz",
"latin pop",
"lofi hip hop",
"mariachi",
"math rock",
"mersey beat",
"metalcore",
"neo soul",
"new age",
"new wave",
"noise rock",
"nu funk",
"nu metal",
"old school hip hop",
"old school soul",
"pop punk",
"pop rap",
"pop rock",
"post hardcore",
"post metal",
"post punk",
"post rock",
"progressive metal",
"progressive rock",
"psychedelic rock",
"psytrance",
"punk",
"ragtime",
"reggaeton",
"renaissance",
"rhythm and blues",
"rock'n'roll",
"romanticism",
"roots reggae",
"salsa",
"samba",
"sertanejo",
"shoegaze",
"ska",
"ska punk",
"smooth jazz",
"soul",
"stoner rock",
"swing",
"symphonic metal",
"synth pop",
"synthwave",
"tango",
"tech house",
"techno",
"thrash metal",
"trance",
"trap",
"trip hop",
"urban",
"volksmusik"
]
},
"moodsEnum": {
"type": "string",
"enum": [
"aggressive",
"calm",
"confident",
"dark",
"dreamy",
"driving",
"energetic",
"epic",
"exciting",
"happy",
"hopeful",
"nostalgic",
"reflective",
"restless",
"romantic",
"sad",
"scary",
"sexy",
"tender",
"uplifting",
"warm",
"whimsical"
]
},
"arousalEnum": {
"type": "string",
"enum": [
"low arousal",
"moderate arousal",
"high arousal"
]
},
"valenceEnum": {
"type": "string",
"enum": [
"negative valence",
"neutral valence",
"positive valence"
]
},
"engagementEnum": {
"type": "string",
"enum": [
"unengaging",
"neutral engagement",
"engaging"
]
},
"pleasantnessEnum": {
"type": "string",
"enum": [
"unpleasant",
"neutral pleasantness",
"pleasant"
]
},
"vocalsEnum": {
"type": "string",
"enum": [
"mixed vocals",
"male vocals",
"female vocals",
"choir",
"instrumental"
]
},
"instrumentsEnum": {
"type": "string",
"enum": [
"acoustic bass",
"acoustic drums",
"acoustic guitar",
"brass",
"dj equipment",
"electric bass",
"electric guitar",
"electronic drums",
"free reed",
"harp",
"non-western folk strings",
"orchestral strings",
"percussion",
"piano",
"saxophone",
"synthesizer",
"vocals",
"western folk strings",
"woodwinds"
]
},
"recordingEnvironmentsEnum": {
"type": "string",
"enum": [
"live",
"studio"
]
},
"soundGenerationEnum": {
"type": "string",
"enum": [
"acoustic",
"electric",
"synthetic"
]
},
"loudnessEnum": {
"type": "string",
"enum": [
"low loudness",
"moderate loudness",
"high loudness"
]
},
"roughnessEnum": {
"type": "string",
"enum": [
"clear",
"moderate roughness",
"distorted"
]
},
"timbreEnum": {
"type": "string",
"enum": [
"bright",
"moderate timbre",
"warm"
]
},
"spaceEnum": {
"type": "string",
"enum": [
"compact",
"moderate space",
"wide"
]
},
"textureEnum": {
"type": "string",
"enum": [
"thin",
"moderate texture",
"full"
]
},
"harmonyEnum": {
"type": "string",
"enum": [
"consonant",
"dissonant"
]
},
"scaleEnum": {
"type": "string",
"enum": [
"minor key",
"major key"
]
},
"keyEnum": {
"type": "string",
"enum": [
"c",
"c#",
"d",
"d#",
"e",
"f",
"f#",
"g",
"g#",
"a",
"a#",
"b"
]
},
"tonalityEnum": {
"type": "string",
"enum": [
"atonal",
"melodious",
"moderate melodiousness",
"monotonous"
]
},
"rhythmEnum": {
"type": "string",
"enum": [
"common time",
"complex time",
"triplets"
]
},
"groovinessEnum": {
"type": "string",
"enum": [
"steady",
"moderate grooviness",
"groovy"
]
},
"tempoEnum": {
"type": "string",
"enum": [
"slow",
"mid-tempo",
"fast"
]
},
"audienceAgeEnum": {
"type": "string",
"enum": [
"generation z",
"younger generation y",
"older generation y",
"generation x",
"younger generation b",
"older generation b"
]
},
"audienceGenderEnum": {
"type": "string",
"enum": [
"diverse",
"female",
"male"
]
},
"audienceRegionEnum": {
"type": "string",
"enum": [
"australia and new zealand",
"central america and the caribbean",
"central and southern asia",
"eastern asia",
"eastern europe",
"northern africa and western asia",
"northern america",
"south america",
"south-eastern asia",
"southern europe",
"sub-saharan africa",
"western and northern europe"
]
},
"originDecadeEnum": {
"type": "string",
"enum": [
"pre-1950s",
"1950s",
"1960s",
"1970s",
"1980s",
"1990s",
"2000s",
"2010s",
"2020s"
]
},
"originRegionEnum": {
"type": "string",
"enum": [
"australia and new zealand",
"central america and the caribbean",
"central and southern asia",
"eastern asia",
"eastern europe",
"northern africa and western asia",
"northern america",
"south america",
"south-eastern asia",
"southern europe",
"sub-saharan africa",
"western and northern europe"
]
},
"useCaseEnum": {
"type": "string",
"enum": [
"background",
"celebrations",
"christmas",
"cooking & eating",
"extreme sports",
"gaming",
"halloween",
"party",
"relaxation/meditation",
"roadtrip",
"study/work",
"summer",
"valentine's day",
"winter",
"workout/fitness"
]
}
}
}
}
Examples
Regular
This example contains the full enhanced metadata event schema.
{
"version": 1774537761,
"releaseId": 27640222,
"trackId": 179750789,
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],
"content": {
"label": "music",
"distribution": {
"no-music": 0,
"music": 1
}
},
"genre": {
"main": {
"labels": [
"latin"
],
"distribution": {
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"folk": 0.00009090909090909092,
"blues": 0,
"country": 0,
"electronic": 0.02304545454545455,
"jazz": 0,
"latin": 0.4535,
"spoken word": 0
}
},
"sub": {
"labels": [
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],
"distribution": {
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}Updated 3 days ago