Do you mean simultaneously?
Obviously, you are aware that the charging socket does not transfer data.
Are you proposing to send power to Mojo via Mojos data socket, whilst it is playing music?
I'm not looking to charge the device, merely have it powered on, but I am sensing that it is either gonna need to be charging or not charging, no in between.
I'm looking to only use one USB cable for that. (I have limited USB slots and I already have a USB hub for expansion and only have one remaining USB port left).
SO, I think what I'll need to do is run an optical cable to my mobo into the Mojo (heh) to meet my target of only using one USB cable.
Again, I don't think this is entirely too clear from the third post (which I did read!) but I think it'd make a great addition to the FAQ!