said by clone:
As I noted above, when using the remote that comes with the DVR, you will program it to control your audio device (TV or Receiver, whatever), then it will also send an extra command to the box to inform it you adjusted the volume.
Steps, etc. has no bearing. They only want to know at what times you raise, lower, or mute the sound. By how much, etc. is not important.
I've just made a test and recorded the output of the remote (IR blasts) on the oscilloscope and compared to the remote of the AV receiver.
Let's put it this way: NO, IT DOESN'T SEND ANY DATA IT SHOULDN'T.