Code deep within Android's YouTube app allegedly hints at a new Music Pass service that will offer unlimited streaming, offline syncing and background playback. In addition, according to Android Police, which found the suspicious code, the YouTube music service won't feature ads on millions of songs, though ads will likely factor in in some way. With Google Music All Access already under the search giant's belt, it's unclear why Google is contemplating yet another premium subscription service, though the two could somehow tie together.

In addition to hints at music streaming, the code found by Android Police also mentions offline video support. "It looks like entire playlists can be cached locally for offline playback, though YouTube up loaders may be able to specify that their videos cannot be saved locally," Android Police wrote. Apparently, 48-hour limitations will be placed on offline videos, so you'll only be able to view content for a limited time.

We've heard plenty of rumors surrounding an actual YouTube music streaming service, but speculation has died down over the past few months. The latest report, from October, claimed the on-demand service would be geared toward mobile use and offer free and paid tiers; the paid portion could cost $10. Nothing official has been announced yet, but with sites like Android Police already finding hints of its existence, it's likely we'll find out all about it very soon.