Hello :-) As I said before, we are working on Lyre project, a Free/Open hardware audio player (DAP) and recorder, for use with RockBox firmware.
We will probably use an SD Card for hold the audio files and for easy the life of users for sharing music (I mean music with Creative Commons license and the recorded by users). My question is: is the USB really need if we have an SD Card? would users still miss the USB? 2nd question: if we need to use USB, does we need to pay royalties for use it? I think we will need USB for an easy way to flash the Rockbox bootloader + firmware on internal flash player memory..
