How to find Free music (tracks) on Google Play

You can add the free songs you're talking about from Magnifier.

Visit the Magnifier home page and the Free Song Archive to access all of the available free music.

1. Select 'Add free music'.
2. Log in to Music Beta (if you're not already logged in).
3. Click the 'Listen Now' button that appears, and it will take you directly to the 'Free songs' playlist in Music Beta.

From the help page.

Note that you can't add a specific playlist, artist, or track.

No, there is no limit, but Albums may end up split or joined based on information in the Track Info and Album Info.

Here is an example of multiple albums merged into one: If you note, there are 52 tracks in the album and there are also a number of duplicate track numbers, as well as multiple artists.

This can be further explained by looking at the Album Info: Here we see some key elements empty:

• Artist
• Album Artist
• Tracks

Though these are not required they can help group the tracks. Which, if we look at a few of the Track Info panels:

We see the missing info cause a common pattern linking separate albums into one. Adding an Album Artists can quickly change my issue, but since you are looking to merge albums/collections removing elements from the track info (that would help ensure proper grouping of tracks) should give you the results you are looking for.

But I'd recommend using the "Playlist" feature, that Google provides, to get better results for groups and minimize future confusions should you decide to share your tracks.