HTC One M7 :: Phone Music Player Can't Find Google Play Songs

The HTC Music player cannot find the songs that I downloaded from Google Play Music? I can't find them either using ES File Explorer although they always show up in the Google "Play Music" app. I've configured the songs that I downloaded from Google "Play Music" to download to the phone and they show as "Pinned" in the "Play Music" app. Lastly I confirmed that the music is on the phone by playing them with "Play Music" while the phone is is airplane mode. I want the default HTC music player to play these songs since that player is available from the lock screen and blink feed.