Originally Posted by NorCal
I recently turned in my old Motorola DCT6412 (2nd gen) box to my Comcast office and upgraded to the newer DCH3416. The old box had a DVI connection that I connected to my JVCHDTV for digital video. I know the DVI output on the 6412 only gave me digital video. I used the optical digital out, connected to my Denon receiver for 5.1 audio.
The newer DCH3416 box has a HDMI output (video and audio) When I connected the HDMI out to the HDMI in on my tv, all I get is just video....no sound. I set my JVC tv to digital sound in....but still no sound. I do know that if I want 5.1 audio I still need to get that from optical or coaxial out of cable box to my receiver....but I am trying to get regular sound (2.0) out of my HDMI. What do I need to do to get audio along with video from this connection.
You will be surprised to find out how many ways you can have a "no sound" problem without an equuipment failure.
Normally, you just plug in the HDMI cable and you have sound. The box will deliver AC3 or PCM digital sound over the cable (no analog), but you need to have settings in both your TV and cable box correct, or the sound may not come out of the speakers.
TV first. I am not familiar with JVC TVs, but normally "digital sound in" means to use the coax or optical input for your sound input. This disables the digital sound on the HDMI input. So, do not select it. Also, some TVs allow you to kill the HDMI sound so that it does not interfere with the sound from your audio system. Look for such a setting in the TV menu. One last word of caution. Some TVs with multiple HDMI inputs will have one of those inputs coupled with a pair of audio jacks for separate analog sound. This is to be used with an input device that has a DVI output, and requires a DVI to HDMI adapter or cable. The HDMI sound might be disabled on this input.
Cable box next. There are special settings for HDMI that were not present in the older boxes with DVI connectors. Leave the TV on, and go to the main menu of the cable box--box power off-Menu--and look for "Additional HDMI settings". Right arrow into this and you will see several options.
"HDMI/DVI Mode" refers to the type of input on your TV. In your case, this must be set to HDMI, or you will get no sound.
"Color Space" refers to the gamut of NTSC colors the box will use. If your TV has "wide color" or something like this, then RGB will probably be the best setting. Otherwise, use YCC, which is the color space used in all previous models of the Motorola box. Some TVs will produce weird colors if you make the wrong choice. This setting will not affect sound, but you need to know that it is here so as to optimize the picture.
Finally, you get to "Audio Output". Here you can choose PCM, auto, or pass thru. I believe auto works for everyone--I think this allows the box to query the TV about whether to send AC3 or PCM). These settings will not affect the optical output of the cable box going to your sound system.
You are finished with the HDMI settings. Turn off the cable box, then turn it back on. Also, make the settings in the Guide Menu as provided by CharterJames.
You should now have sound. Do not forget to turn up the volume. Use your TV remote for this, in case the cable box remote is not yet programmed correctly.