[Elecraft] K3- Background "crackling" using KDVR3

[Bill Wiehe via Elecraft]

Wanted to check with the group to see if anyone else has had a similar situation where they hear a "crackling" nose in the the background when recording a voice message using the KDVR3. I only recently started to use the module for voice recording and noticed the noise immediately. 
Key points to note;
- it presents itself only when in "voice" modes. CW records clearly, that is no background noise.
- I can disconnect everything from the radio (except power source of course) and the noise it will be on the recording.
- In testing I even disconnected the microphone from the K3 and pressed record  in SSB mode and the "crackle" noise could be heard.
- Computers and everything else I can think of were turned off as well.
- If the "MIC" gain is off there is no crackle on the recording. However, as soon as the "MIC" gain is turned up, even a little, the crackle is in the background and "yes" the "CMP" is off.
I have chatted with the the Elecraft Techs but they seem to have run out of ideas at the moment. I checked the Archive as well but saw nothing there. I just wanted to see if anyone else has had a similar experience.
Thanks,
Bill - W0BBI