Accessing Spotify API to access audio features metadata
PlaylistSongFeatures allows you to input a Spotify playlist URL, and get back a selection of audio features - Acousticness, Danceability, Duration, Energy, Valence, Tempo, Speechiness, Mode, Loudness, Liveness, Key, Instrumentalness, Time. individualSong allows you input a Spotify song URL, and get back the same selection of audio features of a particular song.
These audio feature data can then be used to create a CSV file for various uses.