Streaming service Spotify unveiled a second round of 12 new apps on its site Thursday, marking an even greater degree of label participation in the service.Warner Music Group, Universal Music Group and Sony Music Entertainment are all represented in the new batch of apps, as are indies Matador, Domino, X5 and indie group PIAS. Among the label-specific apps released are players dedicated to UMG’s Def Jam, Sony’s Legacy Recordings, Domino and Matador, as well as the Warner Sound, the new WMG venture that launched a dedicated YouTube channel earlier this month. Spotify’s stated objective of social media ubiquity will be bolstered by apps from Digster and Filtr, which can scan a user’s Facebook history, and Tweetvine, which creates a playlist based on Twitter activity. Digital-only classical label X5 (which shares a VC investor with Spotify in Northzone Ventures) was behind app Classify, which aims to simplify classical music searches on the site, often derided as confusing. Admitting that the classical music experience on Spotify “hadn’t been that good,” X5 chief exec Johan Lagerlof told Variety: “The idea was to create an app where you could browse, instead of search…if you want to hear Beethoven symphonies, you should be able to simply type that phrase and see them all in a matter of seconds.” After launching in the U.S. last summer, Spotify opened up its platform to app developers in November. Including today’s additions, the service now has 27 apps.