Synology released DSM 6.1 yesterday, & put into the auto release hopper overnight & it should auto-update this morning or anytime now if you have you system set to do so, if not, you need to get a copy from their "Support" web page to manually load. The new stuff is all Synology OS features, business & security related, nothing much for music/audio replay functions. A minor change is in 'File Services', to enable Windows Explorer & Mac Finder views on your PC/Mac, the 'File View' check box is now renamed 'SMB' & when enabled it opens up the familiar Windows Explorer & Mac Finder screen views.
Also released prior to DSM 6.1 were new revisions of Media Server & Search to enable them to work better with DSM 6.1, that said the old versions worked OK on 6.1 beta & RC, whatever its best to have everything set to auto-update - fit & forget.
If you find one of you usual programs (like Media Server or Minimserver) disappears from the web page desktop view when you restart with 6.1, this has happened before so don't panic, go to Package Centre, open the missing program, touch the Actions button to 'Stop' (turn it off) & then 'Running' (restart)