From what I can see, it's just a Python script, so you should be able to use it ...

nilved on March 4, 2014 | parent | context | favorite | on: Beets – Command-line music manager and auto-tagger

From what I can see, it's just a Python script, so you should be able to use it anywhere there's a Python interpreter. It has some optional compiled dependencies for features like ReplayGain that may not work on ARM, however.