convert optical spdif out to analog video

[mart]

http://cgi.ebay.ca/SONY-Optical-signal-To-RCA-Stereo-Sound-Decoder-PCM1728_W0QQitemZ190361044639QQcmdZViewItemQQptZReceivers_Tuners?hash=item2c5267069f#ht_3842wt_1165

Anyone know if this will work to convert optical out of an HDTV to an old
style stereo receiver via "conventional" rca cables. I assume 12vdc can be
supplied thru an old atx power supply.

Thanks

 

[Kalman Rubinson]

On Wed, 30 Dec 2009 23:40:58 GMT, mart <mxxx@nowherexcv.net> wrote:

http://cgi.ebay.ca/SONY-Optical-signal-To-RCA-Stereo-Sound-Decoder-PCM1728_W0QQitemZ190361044639QQcmdZViewItemQQptZReceivers_Tuners?hash=item2c5267069f#ht_3842wt_1165

Anyone know if this will work to convert optical out of an HDTV to an old
style stereo receiver via "conventional" rca cables. I assume 12vdc can be
supplied thru an old atx power supply.

Thanks

Yes as long as the optical output is PCM. However, I do not know if
your TV outputs PCM or, more likely, DolbyDigital. If the latter, it
will not work.

This one is pricey but probably what you want:
http://www.ramelectronics.net/audio-video/audio-converters-extenders/analog-to-digital-digital-to-analog/digital-to-analog-decoder-gtv-dd-2-aa/prodGTVDD2AA.html
OTOH, if you get a new receiver, it will have the proper input.

Kal

 

[Dave Platt]

http://cgi.ebay.ca/SONY-Optical-signal-To-RCA-Stereo-Sound-Decoder-PCM1728_W0QQitemZ190361044639QQcmdZViewItemQQptZReceivers_Tuners?hash=item2c5267069f#ht_3842wt_1165

Anyone know if this will work to convert optical out of an HDTV to an old
style stereo receiver via "conventional" rca cables.

It may, at least for programs whose audio is being provided in
(or can be downsampled to) "linear PCM" format. This board uses a
Burr-Brown PCM1728 stereo-audio converter chip, which will handle data
sampling rates up to 96 kilosamples/second. I can't tell from the
eBay description, whether this board is designed for just one sampling
rate (e.g. CD) or whether it's capable of locking onto a bunch of
different sampling rates.

This board will almost certainly *not* handle Dolby Digital, or other
multi-channel digital surround-sound formats. If your HDTV tries to
send this format of data, one of two things will probably happen: the
converter will go mute, or it'll start making horrible noises. You
should set your TV's audio mode settings to "linear PCM" only.

I assume 12vdc can be
supplied thru an old atx power supply.

Probably not a good idea. ATX supplies are intended for much higher
current levels than this board is likely to need, and tend to require
a fairly substantial minimum load on the 5-volt line. Without such a
load, they either won't produce 12 volts at all, or will produce too
high a voltage (poor regulation). They may also be noisier
(electrically) than you would want in an audio application.

The board probably doesn't draw more than an ampere at +12 - buy
yourself a 12-volt linear (transformer/rectifier/filter caps) "wall
wart" supply.


--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[mart]

On Wed, 30 Dec 2009 17:33:06 -0800, Dave Platt wrote:

http://cgi.ebay.ca/SONY-Optical-signal-To-RCA-Stereo-Sound-Decoder-PCM1728_W0QQitemZ190361044639QQcmdZViewItemQQptZReceivers_Tuners?hash=item2c5267069f#ht_3842wt_1165

Anyone know if this will work to convert optical out of an HDTV to an old
style stereo receiver via "conventional" rca cables.

It may, at least for programs whose audio is being provided in
(or can be downsampled to) "linear PCM" format. This board uses a
Burr-Brown PCM1728 stereo-audio converter chip, which will handle data
sampling rates up to 96 kilosamples/second. I can't tell from the
eBay description, whether this board is designed for just one sampling
rate (e.g. CD) or whether it's capable of locking onto a bunch of
different sampling rates.

This board will almost certainly *not* handle Dolby Digital, or other
multi-channel digital surround-sound formats. If your HDTV tries to
send this format of data, one of two things will probably happen: the
converter will go mute, or it'll start making horrible noises. You
should set your TV's audio mode settings to "linear PCM" only.


I assume 12vdc can be
supplied thru an old atx power supply.

Probably not a good idea. ATX supplies are intended for much higher
current levels than this board is likely to need, and tend to require
a fairly substantial minimum load on the 5-volt line. Without such a
load, they either won't produce 12 volts at all, or will produce too
high a voltage (poor regulation). They may also be noisier
(electrically) than you would want in an audio application.

The board probably doesn't draw more than an ampere at +12 - buy
yourself a 12-volt linear (transformer/rectifier/filter caps) "wall
wart" supply.

Thanks both for the info. All I really want is some improvement over the
sound, especially bass, of the built-in speakers. 2.1 is fine don't
need/want 5.1. I have looked for PC speakers with a decent sub and optical
input but they are very expensive and I dont want to spend 100's on a HT
setup as I already have a decent receiver and speakers. Looks like I may
need to source a decent used receiver/amp with optical inputs and use my
existing speakers.