Almost none of my music is being matched, whether the albums in question are popular or obscure. The service didn't find a match to any of my Bob Dylan, LCD Soundsystem, Stars of the Lid, or Dinosaur Jr. albums. It was only able to match Melvins' Houdini. This was even after I made sure that the metadata matched the Play Store's.
How does Google Music Scan and Match feature match music?
google music