Apparently not a new issue, but I could'n't find any suggestions that helped med.
Spotify is playing on my HTC one V for many months now, but then suddenly; Song progress bar is moving but NO SOUND.
1) Restarting app.
2) Restarting phone.
3) Removed com.spotify.mobile.android.ui from Android/data to start a fresh.
4) Reinstalled the APP.
5) Enable/disable beats audio.
Other media players work fine.
Sorry - but I'm frustrated with the loss of absolutely primary function for a service I pay for!!!! 😞