Hi Brian,
when I play the message I hear a constant, low level hum/tone in the background (the hum/tone is approximately 1/2 - 3/4 the volume of the words) which is not part of the recorded message itself (I re-recorded the message to check this). I suppose that if the hum/tone is present whenever the speaker is activated, it could be the distortion I am hearing in the chime (but the chime seems quite a bit more distorted than the message).
Other than that, everything seems normal. The chime distortion began suddenly with no apparent event. I had this happen a few years ago and it cleared itself up after about a week but it is quite annoying. I don't want to reset the unit as that would entail re-registering everything, etc.
Thanks!