>1) Do you only hear it when the UGA-165 adapter is connected to this computer?
That is correct. Other computers work fine. The stereo also works fine unless hooked up to the audio output of this computer when the Uga-165 is attached. When running a straight audio signal out of the computer, no noise. So just thsi computer, a Sony Vaio running Vista.
>2) Have you tried a different cable to connect the stereo to the unit?
Yes. No change.
>3) Do you have any power adapter wires that are comingled with the various data cables connecting your devices to the computer? Have you tried reposition these power cables?
Both DC and AC power supplies and wires are physically separated from audio and video feeds.
>4) Are your power cables attached to a surge-suppressing power strip? Do you have one you could try here to see if it makes a difference.
I can try that. But I am almost certain that this noise is an artifact of the video signal. Every once in a while the green light remains on constantly (rather than flashing rapidly), and the noise goes away, plus, as I noted, the speed of the pulsing audio signal matches the speed of the led flashing. And if there is no video signal, i.e., when the audio of a streaming video is playing but the video signal hasn’t yet started, all is well, sound-wise. AS soon as the video signal is sent to the television, however, the noise begins.
>Also, when you were saying you don’t get any audio on the HDMI feed, were you referring to the HDMI connection between the UGA-165 and your display?
I realized after I posted thsi that the adapter doesn’t do audio. I’d forgotten that. Of course, that’s the whole reason I use the hookup I described.