What is the meaning of 多米 in the music service?
My guess is that it comes from the musical scale DO-re-MI in English.  Googling didn’t turn up a standard way to transliterate this – someone used 豆, which may be closer to the English sound, but the more positive connotations of 多 might have led the person coining the name to opt for that instead.  Anyway, 豆米 sounds like some kind of Taiwanese dessert, not the right fit for a music website! :)