RCA Composite or Coax Digital to Optical - AVS Forum
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Old 12-15-2013, 06:06 PM - Thread Starter
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I bought a Panasonic SC-HTB65 2.1 Sound Bar on black Friday.

The tv i have it hooked up to has RCA Composite audio out or Digital Coax

The sound Bar only has RCA Composite Audio or Optical (TOSlink)

I currently have it hooked up with the Red White Composite, I was wondering if I'll have better sound if i switch to the digital coax and use a coax to optical converter.



Also want to mention it is hooked up ti the tv my parents use, and would forget to switch inputs on the sound bar if i hook the items separately
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Old 12-15-2013, 11:14 PM
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The analog audio connection you have is the best. The red and white are just the audio; the other connections are the video.

Doing it the other way involves conversion to digital (in the TV) and then back to analog again.

Toslink is not considered to have very good quality.
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Old 12-15-2013, 11:59 PM
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You can get a cheap (~$20) Coax to Toslink SPDIF converter from Monoprice if you wish to go that direction.
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Old 12-16-2013, 07:20 AM
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Quote:
Originally Posted by commsysman View Post

The analog audio connection you have is the best.

Toslink is not considered to have very good quality.

Huh?

Analog audio is not the best. Although, for this setup (TV to a soundbar) it is adequate.

Optical is/has the same quality as coax. Either is considered good quality for audio.
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Old 12-16-2013, 07:48 AM
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Quote:
Originally Posted by Ratman View Post

Quote:
Originally Posted by commsysman View Post

The analog audio connection you have is the best.

Toslink is not considered to have very good quality.

Huh?

Analog audio is not the best. Although, for this setup (TV to a soundbar) it is adequate.

Optical is/has the same quality as coax. Either is considered good quality for audio.

+1

In many situations the digital connection carries the identical same digital information as was transmitted by the TV station or digital player. It's hard to imagine how anything else could be better.

TOSlink is particularly nice because being optical, it is inherently completely resistant to EMI, hum and other noises. It can neither be affected by nor cause a ground loop, which is common source of hum in audio systems.

If the analog connection works, it is probably adequate, but any repetition of the old school audiophile myths about toslink need to be corrected.
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Old 12-16-2013, 09:02 AM
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Quote:
Originally Posted by commsysman View Post

The analog audio connection you have is the best. The red and white are just the audio; the other connections are the video.

Doing it the other way involves conversion to digital (in the TV) and then back to analog again.

Toslink is not considered to have very good quality.

There goes our "experienced engineer" again spewing nonsense. Commy, you really aren't helping anybody with your misinformation. I recommend you consider moving to audioasylum dot com.
kbarnes701 and grasshoppers like this.
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Old 12-16-2013, 09:19 AM
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The optical link is the best method to transfer audio from one device to another. It involves no conversion and will pass all the Dolby info provided to it so your AVR can use that huge decoder library built in. It will also eliminate any lipsync problems between audio and video display.
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Old 12-16-2013, 11:04 AM
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And more "not so accurate" info.
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Old 12-16-2013, 06:04 PM
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Quote:
Originally Posted by Ratman View Post

And more "not so accurate" info.

As opposed to what, a content free post?
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Old 12-17-2013, 07:13 AM
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Quote:
Originally Posted by arnyk View Post

As opposed to what, a content free post?
Like yours? Did I hurt your feelings Mr. Grumpy?
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Old 12-17-2013, 08:30 AM
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Quote:
Originally Posted by Ratman View Post

Quote:
Originally Posted by arnyk View Post

As opposed to what, a content free post?
Like yours? Did I hurt your feelings Mr. Grumpy?

Since you quoted nothing, and added no useful content it would appear that you are posting to please yourself. It's easy enough to give your posts the attention that they deserve. ;-)
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Old 12-17-2013, 08:40 AM - Thread Starter
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Thank you guys, think i will make the switch this week to the coax (orange connection) and use a coax to optical converter.
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Old 01-19-2014, 05:43 PM
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Quote:
Originally Posted by Mugenstylus1 View Post

Thank you guys, think i will make the switch this week to the coax (orange connection) and use a coax to optical converter.

Mugenstylus1,

Did you ever make this optical to coax converter? Does it work well? What product did you use?

(I have flat panel with only optical out and receiver with digital coax in...)

thanks,

-fafrd

p.s. or anyone else who is successfully using optical-to-coax converter: recommendations appreciated
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Old 01-19-2014, 08:12 PM
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Hi Fafrd,

It sounds like you need an optical to coax converter, while Mugenstylus1 needed a coax to optical converter.

However, they both are pretty much the same, and pretty simple. I have never heard of one not working. Based on price, I would try this one:
http://www.monoprice.com/Product?c_id=104&cp_id=10423&cs_id=1042302&p_id=2948&seq=1&format=2
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Old 01-19-2014, 09:50 PM
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I actually just logged on to ask about that exact product. ^^

Will this convert Toslink to Digital Coax without any loss in quality? Theoretically it's just bits, so as long as it doesn't lose any of those bits in conversion then it should come out 100% of what it went in as right?
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Old 01-21-2014, 12:59 AM
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Hi MallNinja,
Quote:
Originally Posted by MallNinja View Post

Will this convert Toslink to Digital Coax without any loss in quality?
No loss in quality. Optical Toslink and digital-coax are both transmitting S/PDIF data - no data is being modified. You can look at it as similar to a level-shifter - it's just a photo-diode connected to a line driver.

There may be a minor skew added to the signal in the process, but that wouldn't effect quality these days. It might have caused some measurable jitter twenty years ago, but even then the jitter was typically inaudible.
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Old 01-21-2014, 07:26 AM
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Perfect, this will be a good way to use my DACs other inputs since It only has one optical in. My DAC (like most DACs these days) has an asynchronous setting which supposedly eliminates jitter anyway. Thanks!
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Old 01-21-2014, 07:54 AM
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Quote:
Originally Posted by MallNinja View Post

Perfect, this will be a good way to use my DACs other inputs since It only has one optical in. My DAC (like most DACs these days) has an asynchronous setting which supposedly eliminates jitter anyway. Thanks!

It's a dirty little secret it seems, but you don't need an asynch DAC to have a jitter-reducing buffer that works very well, thank you. Never did. Asynch is just another solution looking for a problem.
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Old 01-21-2014, 07:59 PM
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Hi Arny,
Quote:
Originally Posted by arnyk View Post

. . . Asynch is just another solution looking for a problem.
Actually, there was a real problem that Asynch addresses: "How do we sell more DACs?"
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