I have a sonivox speaker for travelling... it can read USB sticks and memory cards. But: Whenever I enter the USB stick, it will always start with the same song. Changing a song takes about 4 seconds. So skipping only 40 songs is gonna take you a while.
Is there some weird way I can't think of, of making the USB stick returning the next song randomly?
I was on the website of said vendor - they don't even list the product there. It is a latin american product, so I am not that surprised.