My local files most of the time aren't producing sound, though Spotify seems to be attempting to play them as the slider progresses along the song normally. What seems weird about the issue to me is that some songs will play once, then be muted if played again. To clarify, my phone's sound is completely fine for every other action and non-local songs.
What are the steps you took to get to the error/issue?
I synced all of my local files to my phone via the desktop app, then I tried playing the playlist composed of nothing but local files and then the playlist with some local, some not and the issue persists on both.
What I expected to happen
I expect my local files to play off my phone.
Did you restart your device when troubleshooting in section B?
Did you read the connection troubleshooting tips?
HTC One M8.
Device’s Operating System
What type of account do you have?
(FYI for the below points: Android devices tend to refer to the internal memory as "SD Card" and the SD card you inserted yourself as "External SD Card")
Space left on your device
Space left on your External SD card (if applicable)
Is your device rooted?
Are you using a custom ROM, if so which one, exactly?
android revolution hd
Did you set your external SD card as storage location?
Did you manually install an older version before installing the latest version from the Play Store?
Do you have the same issue when switching between WiFi/Mobile Data (If applicable)?
My mobile Spotify version
My desktop Spotify version (if applicable)
My mobile provider and country
Do you have a Spotify (non-Facebook) login?
Are you logging in with Facebook or with your Spotify login details?
Do you have any screenshots you can attach to more clearly explain your issue?
Attached is a screenshot of a song that initially played, then was replayed without sound.