AudioFeature class
Json representation of an audio feature
- Annotations
-
- @JsonSerializable()
Constructors
- AudioFeature()
-
AudioFeature.fromJson(Map<
String, dynamic> json) -
factory
Properties
- acousticness ↔ double?
-
A confidence measure from
0.0
to1.0
of whether the track is acoustic.1.0
represents high confidence the track is acoustic.getter/setter pair - analysisUrl ↔ String?
-
An HTTP URL to access the full audio analysis of this track. An access
token is required to access this data.
getter/setter pair
- danceability ↔ double?
-
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 and1.0
is most danceable.getter/setter pair - duration → Duration?
-
The track length
no setter
- durationMs ↔ int?
-
The track length in milliseconds.
getter/setter pair
- energy ↔ double?
-
Energy is a measure from
0.0
to1.0
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.getter/setter pair - hashCode → int
-
The hash code for this object.
no setterinherited
- id ↔ String?
-
The Spotify ID for the track.
getter/setter pair
- instrumentalness ↔ double?
-
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 above0.5
are intended to represent instrumental tracks, but confidence is higher as the value approaches1.0
.getter/setter pair - key ↔ int?
-
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.getter/setter pair - liveness ↔ double?
-
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.
getter/setter pair
- loudness ↔ double?
-
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
and0 db
.getter/setter pair - mode ↔ int?
-
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
.getter/setter pair - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- speechiness ↔ double?
-
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 between0.33
and0.66
describe tracks that may contain both music and speech, either in sections or layered, including such cases as rap music. Values below0.33
most likely represent music and other non-speech-like tracks.getter/setter pair - tempo ↔ double?
-
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.
getter/setter pair
- timeSignature ↔ int?
-
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).
getter/setter pair
- trackHref ↔ String?
-
A link to the Web API endpoint providing full details of the track.
getter/setter pair
- type ↔ String?
-
The object type: "audio_features"
getter/setter pair
- uri ↔ String?
-
The Spotify URI for the track.
getter/setter pair
- valence ↔ double?
-
A measure from
0.0
to1.0
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).getter/setter pair
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toJson(
) → Map< String, dynamic> -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited