I have noticed a clicky noise when listening to music on my NS4G. Anyone else experience this? It doesn't seem like background interference, more like it has trouble producing some frequencies and instead of producing an accurate pitch, it makes a clicky noise. Some songs I don't even hear it, others it's so distracting I can't even listen. It is particularly bad when I plug into the aux in on my car stereo. It even comes up when I stream via blue tooth to my car stereo so I know it is not just a connection issue. I know this probably not a solveable issue, but I was curious if anyone else has experienced it.