Casio BE-300 Listening to music on CASSIOPEIA - Manual (Page 10)

[ Listening to music on CASSIOPEIA ]
(10) At the CASSIOPEIA Top menu, double-tap the "Music Player" application, and
the software will start.
(11) After "Music Player" has started, one of the transferred music files will be loaded
and ready to play. Tap the Play button, and the music will begin playing.