What is this Digitial Audio Out port? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 9 Old 01-24-2008, 03:04 PM - Thread Starter
Senior Member
 
liquidsense's Avatar
 
Join Date: Nov 2006
Location: Chicago
Posts: 208
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I'm very sorry if this is in the wrong area. I couldn't find a better place, and I thought the people here would be the most knowledgeable regarding this issue. On several of my devices, including my Comcast receiver, I have a digital audio out port (not optical). What is this? What is it good for? Is it better or worse than the regular old red/white audio cables?

It's surrounded by the dotted lines:
liquidsense is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 01-24-2008, 03:24 PM
AVS Addicted Member
 
Ratman's Avatar
 
Join Date: May 2002
Location: Collingswood, N.J.
Posts: 14,457
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 167 Post(s)
Liked: 286
It's for Dolby Digital and/or DTS surround (or just PCM stereo). Yes, it better than red/white analog audio connections. Also... it accomplishes the same task as "optical".

Obviously, you also need an audio receiver that has digital audio inputs to take advantage of the better sound/audio.
Ratman is online now  
post #3 of 9 Old 01-24-2008, 03:32 PM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked: 68
Just to add to what Ratman said, it is called a "digital coaxial" (digi coax) connection and as Ratman pointed out, it can transfer the same digital information as the optical (toslink) connection can carry.

Toslink and digi coax are both a type of S/PDIF connection.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #4 of 9 Old 01-24-2008, 03:52 PM - Thread Starter
Senior Member
 
liquidsense's Avatar
 
Join Date: Nov 2006
Location: Chicago
Posts: 208
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Thank you both very much for your help.

One more question -- possibly very dumb...

Does this type of connection require a special cable? Or can I just use either the white or red analogue audio cables?
liquidsense is offline  
post #5 of 9 Old 01-24-2008, 04:13 PM
AVS Club Gold
 
Greg_R's Avatar
 
Join Date: Mar 2000
Location: Portland, OR USA
Posts: 3,912
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Any 75ohm video cable will be optimal. The red, white, or yellow cables that came with your box are almost always 'good enough' for this purpose.

Greg

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Greg_R is offline  
post #6 of 9 Old 01-24-2008, 04:14 PM
AVS Club Gold
 
Greg_R's Avatar
 
Join Date: Mar 2000
Location: Portland, OR USA
Posts: 3,912
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Oh yeah... most receivers require that you assign the digital input to a specific video input. In other words, you may need to tell your receiver that "coax digital input #2" is the audio input for the "TV / SAT" video input.

Greg

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Greg_R is offline  
post #7 of 9 Old 01-24-2008, 04:15 PM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked: 68
Quote:
Originally Posted by liquidsense View Post

Thank you both very much for your help.

One more question -- possibly very dumb...

Does this type of connection require a special wire? Or can I just use either the white or red cord from the analogue audio cords?

Although a plain red/white audio cable MAY work OK, it is best to use a coaxial cable that you know is 75ohm coax cable. This is the same as a yellow-ended video cable, so if you have one of those laying around, you can use it. If you need to buy a 75ohm coax cable, you can get one for a few bucks. Do not spend a bunch of money on one.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #8 of 9 Old 01-24-2008, 04:58 PM
Member
 
ralfwolf's Avatar
 
Join Date: May 2004
Location: San Jose, CA
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
One thing to note here that nobody has mentioned is never connect this to a standard analog audio input of a receiver. The result can damage your receiver and/or speakers and/or ears. What I mean is do *not* plug this port into the same jack the "red/white" cables are plugged into now using any cable. You need to find the "Digital audio input" jack on the back of the receiver and plug it in to that.
ralfwolf is offline  
post #9 of 9 Old 01-28-2008, 01:08 PM - Thread Starter
Senior Member
 
liquidsense's Avatar
 
Join Date: Nov 2006
Location: Chicago
Posts: 208
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Thanks everyone for the great deal of help.
liquidsense is offline  
Reply Audio theory, Setup and Chat

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off