It's possible get metadata info on central control and show in my iOS application?

What is a more consistent way to access audio playing through the podcasts app, Spotify, Pandora, Safari, etc?
I need metadata from 3d party application to show in my player.
I only know the 3rd party tool about Spotify,I have used the one calls Tunelf Spotify Music Converter which can preserve original ID3 tags and metadata info, such as title, artist, album, genre, and so on.

It's possible get metadata info on central control and show in my iOS application?
 
 
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