Sync music tags to PC My music library is located in my PC, and it is copied to my phone SD using the media player I use in the PC.
Now, I listen to music mostly out of home, using the phone. I think it is safer to keep the music library master in the PC (I can lose my phone or it can be stolen). It often happens that I find a song which tags (ID3 for instance) need to be edited/corrected.

Is there a way to correct them and ensure the music in the PC is synced later?
I would like to get a solution which operates on the player level. For example, I would like to edit tags while listening to music in the phone, that would sync later on with my PC.

I use Ubuntu in my PC, with Rhythmbox player. Anyway I am open to alternatives.
If you are open to alternative ways of syncing, you might want to take a look at e.g. FolderSync:

 

It enables you to sync selected locations with different cloud services, but also with your local "home network". You can set it to automatically synchronize, or have it done manually on-demand.

For your issue, you could set either the base directory of your music to completely synchronize between your Android device and your PC, or chose selected directories. So when you updated some tags, only those files should be "copied to the other side", as the others have not changed. Same applies if you add new music files.

There are some other apps in the playstore doing the same job, just in case you want some alternatives. One of them would be FTPSyncX which, other than its name suggests, also handles different protocols (Samba/Windows Shares, SFTP/SSH, FTPS).