Annotation de classification de genres musicaux

La classification de genres musicaux alimente les systèmes de recommandation, la génération de playlists et la découverte musicale. Ce tutoriel montre comment construire des interfaces d'annotation pour l'étiquetage de genres avec des aperçus audio et des taxonomies hiérarchiques.

Classification de genre basique

yaml

annotation_task_name: "Music Genre Classification"
 
data_files:
  - data/tracks.json
 
item_properties:
  audio_path: audio_preview
  metadata_fields: [artist, title, album]
 
# Show track metadata
display:
  show_metadata: true
  metadata_template: "{{artist}} - {{title}}"
 
annotation_schemes:
  - annotation_type: audio_annotation
    audio_display: waveform
    waveform_color: "#EC4899"
    progress_color: "#F472B6"
    speed_control: true
    show_duration: true
    name: primary_genre
    description: "Select the primary genre"
    labels:
      - Rock
      - Pop
      - Hip-Hop
      - Electronic
      - Jazz
      - Classical
      - R&B
      - Country
      - Metal
      - Folk

Taxonomie hiérarchique de genres

yaml

annotation_schemes:
  # Top-level genre
  - annotation_type: radio
    name: genre
    description: "Primary genre"
    labels:
      - Rock
      - Electronic
      - Hip-Hop
      - Pop
      - Jazz
      - Classical
 
  # Subgenre (conditional)
  - annotation_type: radio
    name: subgenre
    description: "Subgenre"
    conditional:
      depends_on: genre
      options:
        Rock:
          - Classic Rock
          - Alternative
          - Indie Rock
          - Hard Rock
          - Punk
          - Grunge
        Electronic:
          - House
          - Techno
          - Trance
          - Drum & Bass
          - Ambient
          - Dubstep
        "Hip-Hop":
          - East Coast
          - West Coast
          - Trap
          - Conscious
          - Lo-fi
        Pop:
          - Synth Pop
          - Dance Pop
          - Indie Pop
          - K-Pop
          - Teen Pop
        Jazz:
          - Bebop
          - Smooth Jazz
          - Fusion
          - Big Band
          - Cool Jazz
        Classical:
          - Baroque
          - Romantic
          - Contemporary
          - Opera
          - Chamber

Étiquetage multi-labels de genres

La musique couvre souvent plusieurs genres :

yaml

annotation_schemes:
  - annotation_type: multiselect
    name: genres
    description: "Select ALL applicable genres (up to 3)"
    labels:
      - Rock
      - Pop
      - Electronic
      - Hip-Hop
      - R&B
      - Jazz
      - Classical
      - Country
      - Folk
      - Metal
      - Punk
      - Indie
      - World
      - Latin
    min_selections: 1
    max_selections: 3
 
  - annotation_type: radio
    name: primary_genre
    description: "Which is the PRIMARY genre?"
    dynamic_from: genres  # Only show selected genres as options

Configuration complète d'annotation musicale

yaml

annotation_task_name: "Music Tagging and Classification"
 
data_files:
  - data/music_library.json
 
item_properties:
  audio_path: preview_url
  metadata_fields:
    - artist
    - title
    - album
    - year
    - duration
 
display:
  show_metadata: true
  metadata_layout: card
  fields:
    - label: "Artist"
      field: artist
    - label: "Track"
      field: title
    - label: "Album"
      field: album
    - label: "Year"
      field: year
 
annotation_schemes:
  # Audio playback configuration
  - annotation_type: audio_annotation
    audio_display: waveform
    waveform_color: "#8B5CF6"
    progress_color: "#A78BFA"
    cursor_color: "#F59E0B"
    height: 100
    show_duration: true
    show_current_time: true
    speed_control: true
    speed_options: [0.75, 1.0, 1.25, 1.5]
    volume_control: true
    default_volume: 0.7
    autoplay: false
    loop: true
 
  # Genre classification
  - annotation_type: multiselect
    name: genres
    description: "Select all applicable genres"
    labels:
      - Rock
      - Pop
      - Electronic/Dance
      - Hip-Hop/Rap
      - R&B/Soul
      - Jazz
      - Classical
      - Country
      - Folk/Acoustic
      - Metal
      - Punk
      - Indie
      - World/International
      - Latin
      - Blues
      - Reggae
    min_selections: 1
    max_selections: 3
 
  # Mood/Energy
  - annotation_type: multiselect
    name: mood
    description: "Select the mood(s) of this track"
    labels:
      - Happy/Uplifting
      - Sad/Melancholic
      - Energetic
      - Calm/Relaxing
      - Aggressive
      - Romantic
      - Dark/Moody
      - Nostalgic
      - Motivational
    min_selections: 1
 
  # Energy level
  - annotation_type: likert
    name: energy
    description: "Energy level"
    size: 5
    min_label: "Very low energy"
    max_label: "Very high energy"
 
  # Danceability
  - annotation_type: likert
    name: danceability
    description: "How danceable is this track?"
    size: 5
    min_label: "Not danceable"
    max_label: "Very danceable"
 
  # Vocal content
  - annotation_type: radio
    name: vocals
    description: "Vocal content"
    labels:
      - Instrumental only
      - Mostly instrumental
      - Balanced
      - Mostly vocals
      - Vocals dominant
 
  # Era/Style
  - annotation_type: radio
    name: era
    description: "Musical era/style"
    labels:
      - Pre-1970s (Classic)
      - 1970s
      - 1980s
      - 1990s
      - 2000s
      - 2010s
      - 2020s/Current
 
  # Quality flags
  - annotation_type: multiselect
    name: flags
    description: "Special flags (if applicable)"
    labels:
      - Explicit content
      - Live recording
      - Remix/Cover
      - Holiday/Seasonal
      - Soundtrack
      - Spoken word sections
    required: false
 
  # Confidence
  - annotation_type: likert
    name: confidence
    description: "Confidence in your genre classification"
    size: 5
    min_label: "Uncertain"
    max_label: "Very confident"
 
annotation_guidelines:
  title: "Music Tagging Guidelines"
  content: |
    ## Sélection du genre
    - Choisissez 1 à 3 genres qui décrivent le mieux le morceau
    - Sélectionnez le genre applicable le plus spécifique
    - En cas de doute, orientez-vous vers des catégories plus larges
 
    ## Évaluation de l'ambiance
    - Considérez le ton émotionnel global
    - Un morceau peut avoir plusieurs ambiances
    - Pensez à ce que la musique vous fait ressentir
 
    ## Énergie et dansabilité
    - Énergie : tempo, intensité, puissance
    - Dansabilité : rythme, clarté du beat, groove
 
    ## Conseils d'écoute
    - Écoutez au moins 30 secondes
    - Prêtez attention aux drops, changements et transitions
    - Considérez l'instrumentation et le style de production

Format de sortie

json

{
  "id": "track_001",
  "audio_url": "/audio/preview_001.mp3",
  "metadata": {
    "artist": "The Beatles",
    "title": "Here Comes the Sun",
    "album": "Abbey Road",
    "year": 1969
  },
  "annotations": {
    "genres": ["Rock", "Pop"],
    "mood": ["Happy/Uplifting", "Nostalgic"],
    "energy": 3,
    "danceability": 2,
    "vocals": "Balanced",
    "era": "Pre-1970s (Classic)",
    "flags": [],
    "confidence": 5
  }
}

Conseils pour l'annotation musicale

Casque de qualité : essentiel pour les nuances de genre
Volume constant : évitez la fatigue liée aux ajustements
Aperçu complet : écoutez suffisamment pour entendre les changements
Connaissance des genres : familiarisez-vous avec les définitions de genres
Faites des pauses : la fatigue auditive affecte le jugement

Prochaines étapes

Ajoutez la détection d'événements audio pour l'identification d'instruments
Configurez le crowdsourcing pour des perspectives diversifiées
Apprenez-en plus sur les métriques d'accord pour la musique

Documentation audio complète sur /docs/features/audio-annotation.