New icon under album art

[SoundElemenets]

Under the context menu of any song there is a new icon which seems to be a different colour for every song and looks to be perhaps a indication of the Dynamics of the song? I thought it was because I recently got the Spotify artist's thing but it looks to be on all tracks.

[rossi1911 · Accepted solution]

It's a barcode. You scan the barcode using another phone to automatically listen to the song.