Is this the weird noise coming from the speaker that everyone is complaining about? It occurs before and after a transmission. Sounds like 2-3 quiet beeps.. Here is a link to the video. Listen closely...
R2D2 is what you can hear with some external speakers. Just get a pair of earbuds and turn the volume all the way down. Plug the earbuds into the external speaker jack and slowly and carefully bring the volume up slightly until you can hear at a normal level.
Then enjoy R2D2!
How did you capture the audio for the YouTube clip?
I had similar noise coming from my BCD536HP. I found my noise was do to the SD card. I replaced the original 4GB card with a 16GB and the noise showed up. Switched back to the smaller card and the noise went away.