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SoundStat
SoundStat
SoundStat is an independent audio analysis API that returns detailed per-track features - tempo (BPM), key, mode, energy, danceability, valence, instrumentalness, acousticness, loudness, plus segment and beat structure - for music tracks referenced by Spotify track ID. Launched in early 2025 as an alternative after Spotify deprecated its public audio-features and recommendations endpoints, SoundStat has analyzed several million tracks and layers a rich recommendation engine (similar, feature-target, mixed-seed, mood, activity, time-of-day, cross-genre, DJ-compatible, contrast, hidden-gems, and more) plus genre-and-feature search on top of its analysis corpus. The REST API is authenticated with an x-api-key header and billed per unique track analyzed.
3 APIs
0 Features
Music Audio Analysis Audio Features Recommendations Track Analysis Spotify Alternative
Retrieve the full audio analysis for a track by its Spotify track ID - tempo, key, mode, key confidence, energy, danceability, valence, instrumentalness, acousticness, loudness,...
Search the analyzed track corpus by genre with pagination, filter on audio-feature ranges (tempo, energy, danceability, valence, instrumentalness, acousticness, popularity, key,...
A recommendation engine built on the analysis corpus, exposing fifteen strategies - similar tracks, feature-target, mixed multi-seed, harmonic progression, DJ-compatible, contra...
Sources
opencollection: 1.0.0
info:
name: SoundStat API
version: '1.0'
request:
auth:
type: apikey
apikey:
key: x-api-key
value: '{{apiKey}}'
in: header
items:
- info:
name: Track Analysis
type: folder
items:
- info:
name: Get Track Analysis
type: http
http:
method: GET
url: https://soundstat.info/api/v1/track/:track_id
params:
- name: track_id
value: ''
type: path
description: Spotify track ID.
docs: "Get detailed audio analysis for a specific track.\n\nParameters:\n----------\n<b>track_id</b> : str (Spotify track\
\ ID)<br>\n<b>x_api_key</b> : str (API key for authentication)<br>\n\nReturns:\n-------\nTrackAnalysis<br>\n Basic\
\ track info (name, artists, genre)<br>\n Track duration in milliseconds<br>\n Audio features (tempo, key, mode,\
\ energy etc.)<br>\n\n\nNotes:\n-----\nIf track hasn't been analyzed, initiates analysis and returns processing status."
- info:
name: Track Status Updates
type: http
http:
method: GET
url: https://soundstat.info/api/v1/track/:track_id/status
params:
- name: track_id
value: ''
type: path
description: Spotify track ID.
docs: "Get real-time status updates for track analysis via Server-Sent Events (SSE).\n\nParameters:\n----------\n<b>track_id</b>\
\ : str (Spotify track ID)<br>\n<b>x_api_key</b> : str (API key for authentication)<br>\n\nReturns:\n-------\nEventSourceResponse<br>\n\
\ Status updates as SSE events<br>\n Event types: status, complete, error<br>\n\nNotes:\n-----\nMaintains an active\
\ connection until analysis is complete or fails."
- info:
name: Search & Discovery
type: folder
items:
- info:
name: Search Tracks
type: http
http:
method: POST
url: https://soundstat.info/api/v1/tracks/search
params:
- name: genre
value: ''
type: query
description: optional
- name: limit
value: ''
type: query
description: optional
- name: offset
value: ''
type: query
description: optional
body:
type: json
data: '{}'
docs: "Search for analyzed tracks with filtering options.\n\nParameters:\n----------\n<b>x_api_key</b> : str (API key\
\ for authentication)<br>\n<b>genre</b> : str, optional (Filter by specific genre)<br>\n<b>limit</b> : int, default=50\
\ (Maximum number of results, max 100)<br>\n<b>offset</b> : int, default=0 (Number of results to skip)<br>\n<b>filters</b>\
\ : AnalysisFilters, optional (Audio feature filters)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List of matching\
\ track IDs<br>\n\nNotes:\n-----\nSupports pagination and complex audio feature filtering."
- info:
name: Get Available Genres
type: http
http:
method: GET
url: https://soundstat.info/api/v1/genres
docs: "Get list of all available genres in the database.\n\nParameters:\n----------\n<b>x_api_key</b> : str (API key for\
\ authentication)<br>\n\nReturns:\n-------\nDict<br>\n genres: List[str] (List of unique genre names)<br>\n\nNotes:\n\
-----\nOnly returns genres that have at least one analyzed track."
- info:
name: Get Analysis Stats
type: http
http:
method: GET
url: https://soundstat.info/api/v1/stats
docs: "Get comprehensive statistics about analyzed tracks.\n\nParameters:\n----------\n<b>x_api_key</b> : str (API key\
\ for authentication)<br>\n\nReturns:\n-------\nDict<br>\n general: Dict (Overall statistics)<br>\n - total_tracks:\
\ int<br>\n - analyzed_tracks: int<br>\n - unique_genres: int<br>\n - avg_popularity: float<br>\n\
\ top_genres: List[Dict] (Most common genres)<br>\n audio_characteristics: Dict (Average audio features)<br>\n\
\nNotes:\n-----\nProvides a statistical overview of the analyzed music database."
- info:
name: Recommendations
type: folder
items:
- info:
name: Get Similar Tracks
type: http
http:
method: GET
url: https://soundstat.info/api/v1/recommendations/similar
params:
- name: seed_track_id
value: ''
type: query
description: required
- name: limit
value: ''
type: query
description: optional
- name: min_popularity
value: ''
type: query
description: optional
- name: genre_match
value: ''
type: query
description: optional
docs: "Get track recommendations based on a seed track.\n\nParameters:\n----------\n<b>seed_track_id</b> : str (Spotify\
\ ID of the reference track)<br>\n<b>limit</b> : int, default=20 (Number of recommendations, max 100)<br>\n<b>min_popularity</b>\
\ : int, optional (Minimum popularity score 0-100)<br>\n<b>genre_match</b> : bool, default=False (Prioritize same genre)<br>\n\
<b>x_api_key</b> : str (API key for authentication)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List of recommended\
\ track IDs<br>\n\nNotes:\n-----\nUses audio features to find tracks with similar characteristics."
- info:
name: Get Recommendations By Features
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/by-features
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: "Get track recommendations matching specific audio features.\n\nParameters:\n----------\n<b>features</b> : TargetFeatures\
\ (Target audio characteristics)<br>\n - tempo: float, optional (Target BPM, 0-300)<br>\n - energy: float, optional\
\ (Target energy level, 0-1)<br>\n - danceability: float, optional (Target danceability, 0-1)<br>\n - duration_ms:\
\ int, optional (Target duration in ms, 30000-900000)<br>\n - other audio features...<br>\n<b>x_api_key</b> : str\
\ (API key for authentication)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List of matching track IDs<br>\n\nNotes:\n\
-----\nFinds tracks that best match the specified audio characteristics."
- info:
name: Get Mixed Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/mixed
body:
type: json
data: "{\n \"seed_tracks\": [\n \"3n3Ppam7vgaVa1iaRUc9Lp\"\n ],\n \"limit\": 20\n}"
docs: Get Mixed Recommendations
- info:
name: Get Progression Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/progression
body:
type: json
data: "{\n \"parameter\": \"\",\n \"direction\": \"\"\n}"
docs: Get tracks with progressively changing audio characteristics.
- info:
name: Get Compatible Tracks
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/compatible
body:
type: json
data: "{\n \"track_id\": \"\",\n \"limit\": 20\n}"
docs: "Get tracks that are musically compatible with a reference track.\n\nParameters:\n----------\n<b>params</b> : CompatibleParams<br>\n\
\ - track_id: str (Reference track ID)<br>\n - compatibility_type: str, default=\"both\" (key, bpm, both)<br>\n\
\ - limit: int, default=20 (Number of recommendations)<br>\n - min_popularity: int, optional (Minimum popularity\
\ score)<br>\n<b>x_api_key</b> : str (API key for authentication)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List\
\ of tracks compatible with the reference track<br>\n\nNotes:\n-----\nUseful for DJ mixing, creating smooth transitions,\
\ or harmonic playlists."
- info:
name: Get Contrast Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/contrast
body:
type: json
data: "{\n \"track_id\": \"\",\n \"limit\": 20\n}"
docs: "Get tracks with characteristics contrasting to a reference track.\n\nParameters:\n----------\n<b>params</b> : ContrastParams<br>\n\
\ - track_id: str (Reference track ID)<br>\n - contrast_features: List[str], default=[\"energy\", \"valence\"\
] (Features to contrast)<br>\n - limit: int, default=20 (Number of recommendations)<br>\n<b>x_api_key</b> : str (API\
\ key for authentication)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List of tracks with contrasting characteristics<br>\n\
\nNotes:\n-----\nCreates variety in playlists by finding tracks with opposite characteristics."
- info:
name: Get Cross Genre Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/cross-genre
body:
type: json
data: "{\n \"track_id\": \"\",\n \"limit\": 20\n}"
docs: Get tracks from different genres with similar audio characteristics.
- info:
name: Get Time Of Day Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/time-of-day
body:
type: json
data: "{\n \"time\": \"evening\",\n \"limit\": 20\n}"
docs: "Get track recommendations suitable for a specific time of day.\n\nParameters:\n----------\n<b>params</b> : TimeOfDayParams<br>\n\
\ - time: str (One of: morning, afternoon, evening, night)<br>\n - genre: str, optional (Specific genre filter)<br>\n\
\ - limit: int, default=20 (Number of recommendations)<br>\n<b>x_api_key</b> : str (API key for authentication)<br>\n\
\nReturns:\n-------\nTrackIDList<br>\n List of recommended track IDs suitable for the time of day<br>\n\nNotes:\n\
-----\nDifferent times of day have different energy/mood profiles."
- info:
name: Get Hidden Gems Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/hidden-gems
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: Get recommendations for lesser-known tracks with high-quality audio features.
- info:
name: Get Beat Structure Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/beat-structure
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: "Get recommendations for tracks with specific beat structure characteristics.\n\nParameters:\n----------\n<b>params</b>\
\ : BeatStructureParams<br>\n - min_regularity: float, default=0.7 (Minimum beat regularity score 0-1)<br>\n -\
\ tempo_min: float, optional (Minimum tempo in BPM)<br>\n - tempo_max: float, optional (Maximum tempo in BPM)<br>\n\
\ - genre: str, optional (Specific genre filter)<br>\n - limit: int, default=20 (Number of recommendations)<br>\n\
<b>x_api_key</b> : str (API key for authentication)<br>\n\nReturns:\n-------\nTrackIDList<br>\n List of recommended\
\ track IDs matching beat structure criteria<br>\n\nNotes:\n-----\nUseful for finding tracks with consistent, predictable\
\ beat patterns."
- info:
name: Get Duration Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/duration
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: Get track recommendations based on specific duration requirements.
- info:
name: Get Mood Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/mood
body:
type: json
data: "{\n \"mood\": \"happy\",\n \"limit\": 20\n}"
docs: Get track recommendations based on desired mood.
- info:
name: Get Activity Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/activity
body:
type: json
data: "{\n \"activity\": \"workout\",\n \"limit\": 20\n}"
docs: Get track recommendations suitable for specific activities.
- info:
name: Get Instrumental Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/instrumental
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: Get recommendations for instrumental tracks.
- info:
name: Get Acoustic Recommendations
type: http
http:
method: POST
url: https://soundstat.info/api/v1/recommendations/acoustic
body:
type: json
data: "{\n \"limit\": 20\n}"
docs: Get recommendations for acoustic tracks.
bundled: true