Hey phans I have been having these issues as well. I have figured out how to fix the issue in Windows 7.
The spotify guys were right, it's all about the META data. Here is the solution...
Before you import the tracks to the playlist you have to clear out all the meta data. Here's what I do..
1. open the file containing said music files.
2. Highlight them all and then right click go to properties
3. click the details tab
4. at the bottom of this menu click "Remove Properties and Personal Information"
5. check the radio button "remove the following properties from this file:" Then press select all and press okay.
Now that the META tags have been removed, you join import the track into spotify as you normally would. The downside to this process is that you have to rename your tracks as spotify will import just the filename. But hey at least it's playing the right track now!
You may experiment with which META options you remove to avoid having to rename your tracks.
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I have finaly solved my sync issue, which appeared to be problem with my OS X 10.9 firewall. For some reason firewall was blocking any connections to the Spotify application. All you have to do is to change your firewall policy in Settings->Firewall->Firewall Options. Find Spotify application and make sure it's configured to allow incoming connections.
Update: In my case, simply uninstalling Spotify on the phone and re-installing it and re-downloading the playlist in question seems to have fixed the issue. ¯\_(ツ)_/¯
I seem unable to sync files to the mobile app. These songs used to work just fine on my phone, but are now grayed out. When I tap on them, it says I need to just get my computer and phone on the same wifi and open both apps, but that does not appear to do anything. My phone also isn't showing up in a "Devices" menu. Is this still what I should expect?
Notably, the two apps are able to communicate: while I had both apps open, I started playing one of the songs in question on the computer just to verify it worked at all, and my phone lit up with a message indicating that I could control the music on my computer from my phone. There's now a bar at the bottom of the app, similar to the bar you get in Offline Mode, but now it says "Playing from: <the hostname of my laptop>".
Was there a change in behavior that has not yet been documented? I did check - the firewall is off, and I'm using an AirPort Extreme, so UPNP should not be a problem. This is confirmed, in any case, by the phone being able to see the music being played on the computer.
Mac app version: 184.108.40.206.g9977a14b on OSX Mavericks
The devices section will be coming back in a future update.
In the meantime: You won't be able to see an indication in the desktop client that the device is paired with the desktop client. But as long as they both are on the same WiFi network you should be able to trigger the local files sync by toggling the offline toggle on the playlist on your device. Just make sure that the local files are in a playlist of their own so that this will work.
MattSudaRock Star 24
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Lame as it is, I am pretty sure I resolved it by removing Spotify from my phone, re-installing it, and going through the normal sync instructions. It re-downloaded all the songs and all is well once again ¯\_(ツ)_/¯
I have tried this and it does not work. I can hit play on Sppotify on my Mac and it will play the song on my iPhone 6 so I know the devices are talking to each other, but the song will not sync to my iPhone and remains grayed out in any of the multiple playlists I have tried adding it to.