Only YouTube & Soundcloud?!?

When I first downloaded this it let me use Spotify. Now I can only choose music from Soundcloud & YouTube (and my music library but that then takes me to a YouTube video of the song in my library). The actually functionality of the app is fine but what is the point if you cant actually play the music you want?? Let us use Spotify or Apple Music please!!

Idle1 about AmpMe – Speaker & Music Sync, v3.5.0