Class: RSpotify::AudioFeatures

Inherits:
Base
  • Object
show all
Defined in:
lib/rspotify/audio_features.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#external_urls, #href, #id, #type, #uri

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#complete!, #embed, #method_missing, #respond_to?

Constructor Details

#initialize(options = {}) ⇒ AudioFeatures 



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# 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

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class RSpotify::Base

Instance Attribute Details

#acousticness ⇒ Float

A confidence measure from 0.0 to 1.0 of whether the track is acoustic. 1.0 represents high confidence the track is acoustic.



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# File 'lib/rspotify/audio_features.rb', line 18

def acousticness
  @acousticness
end

#analysis_url ⇒ String

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def analysis_url
  @analysis_url
end

#danceability ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def danceability
  @danceability
end

#duration_ms ⇒ Integer

The duration of the track in milliseconds.



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# File 'lib/rspotify/audio_features.rb', line 18

def duration_ms
  @duration_ms
end

#energy ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def energy
  @energy
end

#instrumentalness ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def instrumentalness
  @instrumentalness
end

#key ⇒ Integer

The key the track is in. Integers map to pitches using standard Pitch Class notation. E.g. 0 = C, 1 = C♯/D♭, 2 = D, and so on.



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# File 'lib/rspotify/audio_features.rb', line 18

def key
  @key
end

#liveness ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def liveness
  @liveness
end

#loudness ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def loudness
  @loudness
end

#mode ⇒ Integer

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def mode
  @mode
end

#speechiness ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def speechiness
  @speechiness
end

#tempo ⇒ Float

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.



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# File 'lib/rspotify/audio_features.rb', line 18

def tempo
  @tempo
end

#time_signature ⇒ Integer

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).



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# File 'lib/rspotify/audio_features.rb', line 18

def time_signature
  @time_signature
end

#track_href ⇒ String

A link to the Web API endpoint providing full details of the track.



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# File 'lib/rspotify/audio_features.rb', line 18

def track_href
  @track_href
end

#valence ⇒ Float

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).



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# File 'lib/rspotify/audio_features.rb', line 18

def valence
  @valence
end

Class Method Details

.find(ids) ⇒ AudioFeatures+

Retrieves AudioFeatures object(s) for the track id(s) provided

Examples:

audio_features = RSpotify::AudioFeatures.find('1zHlj4dQ8ZAtrayhuDDmkY')
audio_features = RSpotify::AudioFeatures.find(['1zHlj4dQ8ZAtrayhuDDmkY', '7ouMYWpwJ422jRcDASZB7P', '4VqPOruhp5EdPBeR92t6lQ'])


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# 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

.search ⇒ Object

Spotify does not support search for audio features



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# File 'lib/rspotify/audio_features.rb', line 66

def self.search(*)
  warn 'Spotify API does not support search for audio features'
  false
end