Originally Posted by rickysio
That's a lack of RF shielding, not CPU noise. If you must, place some sheets of aluminium foil between the PCB and the screen (do this only when the warranty is over and you're confident of your tech ability), it should alleviate the sound.
I thought this is why SanDisk used a metal plate shielding the circuitry from interference on the original design of the Clip, unless they’ve removed it in the newer “+” version I don’t see any added benefit from adding foil. Rather than your suggestion I would recommend an impedance adapter
or a portable amp as saratoga has already suggested, less risk as a recommendation to others.