Dolby DIgital through Adelphia Digital Cable Question

[NARKOSIS]

Whats going on everyone. I just got Adelphias High-Speed Internet and Digital Cable. I use a Dolby Digital receiver for my Xbox using the optical port on the "SAT" setting. I went out and purchased a digital coax cable to get dolby digital from Adelphia. So far, to my knowledge, everything is hooked up properly. Digital Coax from cable box to the receiver. And the basic R/W/S-Video from the cable box to the receiver for prologic. I can hear the Prologic on every channel. But I hear nothing when I switch it over to Coax. What am I doing wrong? Do I need to watch for a specific program to come on with the disclaimer of "Presented in Dolby Digital Where Available" and switch it to the Coax setting?

 

[Az B]

What cable box do you have? I had to go into the setup menu on mine (Motorola) and turn on the digital output. I think they default off so someone doesn't accidently hook it up to an analog input and make smoke with thier speakers.

 

[Audioholics]

Analogue channels don't have DD. And most digital channels only have 2.0. To get cable audio you have to hook up both analogue and digital audio outputs and have a receiver that (hopefully) auto-senses and switched inputs for you.

When a digital channel has 5.1 it will auto-decode for you.

 

[NARKOSIS]

What cable box do you have? I had to go into the setup menu on mine (Motorola) and turn on the digital output. I think they default off so someone doesn't accidently hook it up to an analog input and make smoke with thier speakers.

I have the Scientific Atlanta 3100 Explorer. I checked the audio settings and it is saying "Dolby Digital"

 

[NARKOSIS]

Analogue channels don't have DD. And most digital channels only have 2.0. To get cable audio you have to hook up both analogue and digital audio outputs and have a receiver that (hopefully) auto-senses and switched inputs for you.

When a digital channel has 5.1 it will auto-decode for you.

So if the show Im watching gives me the statement "Presented in Dolby Digital where available", then I should switch it to "Coax" and should get sound? And any other station should be on "Analog"? I dont believe it auto-detects, but I havent had much time to play around with it. Any shows off the top of your heads that you know is in Dolby Digital? Or any stations? Sorry, new to AV. Hope I dont sound too dumb lol


P.S. - If that is the case, should i expect no sound at all when I have my reveiver set to "Coax" when Im watching a show not presented in DD?

 

[Az B]

Analogue channels don't have DD. And most digital channels only have 2.0. To get cable audio you have to hook up both analogue and digital audio outputs and have a receiver that (hopefully) auto-senses and switched inputs for you.

When a digital channel has 5.1 it will auto-decode for you.

I have the Motorola 6200? (I can't remember the model number off the top of my head, but it's the HD box with DVI outs) and it needs no analog audio connections. All audio is sent via the digital coax. The receiver switches between pro logic and discreet based on the signal. All HD channels have 5.1, although every program may not have it.

 

[NARKOSIS]

I have the Motorola 6200? (I can't remember the model number off the top of my head, but it's the HD box with DVI outs) and it needs no analog audio connections. All audio is sent via the digital coax. The receiver switches between pro logic and discreet based on the signal. All HD channels have 5.1, although every program may not have it.

see thats what I initially thought. When I first got the Coax, all I did was hook that up and no sound was givin at all. Then I hooked up the R/W/S-video connector and got sound but only Prologic sound.

 

[MDS]

Hawke summed it up best and that is exactly my experience with Time Warner. The channels below 100 are analog signals, the middle tier is a mix and depends on the particular network and show being broadcast at the time, and all of the movie channels and music channels are digital (mostly DD 2.0, but movies are often DD 5.1).

I have the Scientific Atlanta box as well. I have to use both analog and digital connections. The receiver (Onkyo) auto-detects the signal and favors the digital output if both are present. If you receiver does not auto-detect then you will have to go in and change the output to digital (what receiver is it?). You should also verify that the coax digital input is assigned to the receiver input you use to view from the cable box; ie if you connect the set top box to the 'video1' input, then you must assign the coax digital in to video1 in. If the receiver doesn't allow you to assign the digital ins to any input selector, then it is likely hard-wired to a specific input - like dvd - and you will have to connect the set top box to that input.

 

[NARKOSIS]

Hawke summed it up best and that is exactly my experience with Time Warner. The channels below 100 are analog signals, the middle tier is a mix and depends on the particular network and show being broadcast at the time, and all of the movie channels and music channels are digital (mostly DD 2.0, but movies are often DD 5.1).

I have the Scientific Atlanta box as well. I have to use both analog and digital connections. The receiver (Onkyo) auto-detects the signal and favors the digital output if both are present. If you receiver does not auto-detect then you will have to go in and change the output to digital (what receiver is it?). You should also verify that the coax digital input is assigned to the receiver input you use to view from the cable box; ie if you connect the set top box to the 'video1' input, then you must assign the coax digital in to video1 in. If the receiver doesn't allow you to assign the digital ins to any input selector, then it is likely hard-wired to a specific input - like dvd - and you will have to connect the set top box to that input.

So then its a good assumption to think that if I were to change my receiver to "Coax" on a non DD program, Id hear nothing? I Just got a list from Dolby's website on which programs are in 5.1, some of them are on tonite, so I'll give it one more good final test.

Its just a lowly RCA 200watt receiver. I plan on getting a better one soon but this was my first dip into 5.1 about 6-7 months ago. For anything digital, it has to be assigned to the "SAT" setting which gives me (1)Optical In (1)Optical Out and (1)Coax In.

 

[JohnA]

Make sure

Hey NARKOSIS,

Make sure that on the receiver you assign the digital coax to the proper input. It is not assigned out of the box...so you need to tell the receiver that the digital coax is going to "X" input. Then you should get sound.

Good Luck

 

[robfed123]

re digital coax out

Did anyone confirm that the digital coax out only sends out dolby digital 5.1, and that only analog works if dd 5.1 is not being sent for the program.
Does that
go for hdtv on cablevision as well. Do the hdtv automatically always broadcast with dd 5.1? if not is the audio some kind of digital anyway that should work through my reciever?
I checked my reciever with the dvd player digital coax out and it works even if its not dd 5.1 but regualr dolby 2.0.
so its the cable box, scientific atlanta 4200hd that is not pushing out digital sound even though i set the menu to output dolby digital.
It used to work before i had hdtv version of th box. Since i got the hd version of the box, it doesnt work.
what else can i try, maybe a reboot of the cable box?

 

[robfed123]

re dolby digital and digital coax

i checked tonight with a programbroadcast with dd 5.1 and no sound out of the digital out of the cable box.
i guess a call to cust service is in order.