Hi all,
I just confirmed upload of modified ADK2012 to DUE on both Mac and Win in my desk.
Mac:
Macbook Pro 10.6 with JDK 6 DUE: program port
Win:
Windows7 64bit DUE: native port (BOSSA Program port (COM**))
Thanks to aleu and jamgofei and all.
For 2ch playback, "process audio" in accessory.c seems starting point to understand and modify.
Never forget erase button 
Sho