Here's my experiences with the Samsung Galaxy Note 2 and Fiio E07K. Plugging in a Lindy micro USB to mini USB results in a notification popping up that a USB device was connected. HOWEVER it will not pipe the sound out through the E07K using the stock player nor the Neutron MP (in fact nothing else). An install of the USB Audio Recorder Pro Trial will allow me to play FLAC files as others have discovered. Completely stock phone with the specifications listed below. Perhaps I need to root and install a different ROM?
SMP PREEMPT Tue Feb 26 08:19:15 KST 2013