class RSpotify::AudioFeatures
@attr [Float] acousticness A confidence measure from 0.0 to 1.0 of whether the track is acoustic. 1.0 represents high confidence the track is acoustic. @attr [String] analysis_url An HTTP URL to access the full audio analysis of this track. This URL is cryptographically signed and configured to expire after roughly 10 minutes. Do not store these URLs for later use. @attr [Float] danceability Danceability describes how suitable a track is for dancing based on a combination of musical elements including tempo, rhythm stability, beat strength, and overall regularity. A value of 0.0 is least danceable and 1.0 is most danceable. @attr [Integer] duration_ms The duration of the track in milliseconds. @attr [Float] energy Energy is a measure from 0.0 to 1.0 and represents a perceptual measure of intensity and activity. Typically, energetic tracks feel fast, loud, and noisy. For example, death metal has high energy, while a Bach prelude scores low on the scale. Perceptual features contributing to this attribute include dynamic range, perceived loudness, timbre, onset rate, and general entropy. @attr [Float] instrumentalness Predicts whether a track contains no vocals. “Ooh” and “aah” sounds are treated as instrumental in this context. Rap or spoken word tracks are clearly “vocal”. The closer the instrumentalness value is to 1.0, the greater likelihood the track contains no vocal content. Values above 0.5 are intended to represent instrumental tracks, but confidence is higher as the value approaches 1.0. @attr [Integer] key The key the track is in. Integers map to pitches using standard {en.wikipedia.org/wiki/Pitch_class Pitch Class notation}. E.g. 0 = C, 1 = C♯/D♭, 2 = D, and so on. @attr [Float] liveness Detects the presence of an audience in the recording. Higher liveness values represent an increased probability that the track was performed live. A value above 0.8 provides strong likelihood that the track is live. @attr [Float] loudness The overall loudness of a track in decibels (dB). Loudness values are averaged across the entire track and are useful for comparing relative loudness of tracks. Loudness is the quality of a sound that is the primary psychological correlate of physical strength (amplitude). Values typical range between -60 and 0 db. @attr [Integer] mode Mode indicates the modality (major or minor) of a track, the type of scale from which its melodic content is derived. Major is represented by 1 and minor is 0. @attr [Float] speechiness Speechiness detects the presence of spoken words in a track. The more exclusively speech-like the recording (e.g. talk show, audio book, poetry), the closer to 1.0 the attribute value. Values above 0.66 describe tracks that are probably made entirely of spoken words. Values between 0.33 and 0.66 describe tracks that may contain both music and speech, either in sections or layered, including such cases as rap music. Values below 0.33 most likely represent music and other non-speech-like tracks. @attr [Float] tempo The overall estimated tempo of a track in beats per minute (BPM). In musical terminology, tempo is the speed or pace of a given piece and derives directly from the average beat duration. @attr [Integer] time_signature An estimated overall time signature of a track. The time signature (meter) is a notational convention to specify how many beats are in each bar (or measure). @attr [String] track_href A link to the Web API endpoint providing full details of the track. @attr [Float] valence A measure from 0.0 to 1.0 describing the musical positiveness conveyed by a track. Tracks with high valence sound more positive (e.g. happy, cheerful, euphoric), while tracks with low valence sound more negative (e.g. sad, depressed, angry).
Public Class Methods
Retrieves AudioFeatures
object(s) for the track id(s) provided
@param ids [String, Array] Either a single track id or a list track ids. Maximum: 100 IDs. @return [AudioFeatures, Array<AudioFeatures>]
@example
audio_features = RSpotify::AudioFeatures.find('1zHlj4dQ8ZAtrayhuDDmkY') audio_features = RSpotify::AudioFeatures.find(['1zHlj4dQ8ZAtrayhuDDmkY', '7ouMYWpwJ422jRcDASZB7P', '4VqPOruhp5EdPBeR92t6lQ'])
# File lib/rspotify/audio_features.rb, line 28 def self.find(ids) case ids when Array url = "audio-features?ids=#{ids.join(',')}" response = RSpotify.get(url) return response if RSpotify.raw_response response['audio_features'].map { |i| i.nil? ? nil : AudioFeatures.new(i) } when String url = "audio-features/#{ids}" response = RSpotify.get(url) return response if RSpotify.raw_response AudioFeatures.new response end end
# File lib/rspotify/audio_features.rb, line 45 def initialize(options = {}) @acousticness = options['acousticness'] @analysis_url = options['analysis_url'] @danceability = options['danceability'] @duration_ms = options['duration_ms'] @energy = options['energy'] @instrumentalness = options['instrumentalness'] @key = options['key'] @liveness = options['liveness'] @loudness = options['loudness'] @mode = options['mode'] @speechiness = options['speechiness'] @tempo = options['tempo'] @time_signature = options['time_signature'] @track_href = options['track_href'] @valence = options['valence'] super(options) end
Spotify does not support search for audio features
# File lib/rspotify/audio_features.rb, line 66 def self.search(*) warn 'Spotify API does not support search for audio features' false end