Question 1

Bought this, notice it extracts audio but also allows audio to pass thru to TV. Is there anyway to stop that passthru?

Accepted Answer

Yes, but the device has to be designed to do that. Aside from looking for it as a feature, some of the ones that have selectable audio output formats do it as a side-effect,, for example, some won’t pass audio to the TV when in 5.1 audio mode, but will in other modes.

Question 2

The picture shows left and right audio. The description says 3.5mm jack. Which one is it?

Accepted Answer

The unit I have does not have a 3.5 mm jack.  The two RCA jacks provide right and left audio to an amplifier
There is a fiber optic (TOS) link for digital audio and a swithch which selects the audio format

Question 3

does this convert 2d video signal  into 3d ?

Accepted Answer

No, this device cannot convert a 2D signal to a 3D signal. It is merely stating that you can run a 3D signal through the box without issues.  The Tv, Cable, this box, whatever is driving the display (eg, a disk player.console, or pc), and the content you're trying to stream all have to all support a 3D signal. Movies especially, are hard to find in 3D. The film needs to be recorded with two cameras working simultaneously, like how people use two eyes to make a 3d image of their surroundings.  Doing this without two cameras requires someone to guess how close the object should be, a very imperfect science.

--Basic rundown on how 3D works

The marketing is referring to HDMI's ability to carry a stereo-graphic 3D signal. This is used by special tvs to make a 3 dimensional image. It is basically two simultaneous video streams. One goes into the left eye and the other goes into the right (the exact technology that achieves this varies, but it requires special hardware, like special glasses that only allow a frame of video to go through one eye at a time, and alternates at a rate too fast to notice). The two streams would have slight differences in the image that give the illusion of 3D. The same way that your left eye sees slightly different from you right eye. But this requires every chain in the link to support the feature.

Question 4

Can you have audio going out the red and white rca along with the tv speakers? my parents cable box can do this and my dad uses headphones.

Accepted Answer

That depends on your TV.  
Generally yea if your TV has an hdmi output or you use a cable box / DVR and put this between the box and the TV.
Some (Samsung) tv's disable speakers when the External Speaker option is selected in the menu.
If you want the TV speakers on, using this hdmi should allow you to use both.

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