Rockbox has established itself as a viable Free Software alternative to the
	firmware on many Digital Audio Players (DAPs).  One of the keys to its
	appeal is the fact that new features are constantly being developed and
	improved.  In August 2007 development began on a USB stack, which allows a
	DAP to connect to a computer to transfer files and information without
	having to reboot into the manufacturer firmware.  This is a proposal to add
	USB Audio support to Rockbox which will allow...

    (a) isochronous to implement in the driver
    (b) building the configuration descriptor/choosing what features are enabled
    (c) implementing the control requests
    (d) getting the isochronous data stream in the driver
    (e) sending an isochronous data stream from the driver
    (f) tying all this to the audio system