Pine player is a wonderful app for audiophiles that don't have a lot of money to spend on expensive players like JRiver or Audirvana. The addition of the ability to play SACD ISO files directly is really a great added functionality. It appears, though, that this is not totally functional yet. Some ISO SACD will play with no problems while some others won't be recognized. You get a message saying 'file doesn't exist'. These are file that are perfectly OK though because they can be played with other players.