Can the TV output 5.1 through toslink? - AVS Forum

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mwok's Avatar mwok
10:09 AM Liked: 10
post #1 of 6
11-17-2011 | Posts: 176
Joined: Sep 2008
I got the HTPC connected to Samsung 52" TV through HDMI. Then the TV connects to the speakers through toslink.

This way, I can only get Stereo (Windows shows only Stereo is available for the HDMI audio).


Instead, if I connect the PC to Denon receiver (hdmi) and then receiver to TV (hdmi) and receiver to speakers, I get full 5.1 audio. Windows HDMI audio shows 5.1.

Does this mean the TV can only output stereo to the speakers if the receiver is bypassed?
Puwaha's Avatar Puwaha
10:41 AM Liked: 34
post #2 of 6
11-17-2011 | Posts: 1,124
Joined: Jan 2003
It depends on the model of your TV, but most TVs only return stereo through the TOSlink/SPDIF link. This is because the TV itself only has two speakers, so it reports upstream on the HDMI link that it only supports 2 channel audio. Your HTPC will never send it 5.1.

You'd want to run your HDMI through a HDMI-capable Audio receiver first, and then out to the TV. Or, you can run the audio from your HTPC separately to your audio receiver through SPDIF or analog depending on what your sound card and receiver can handle.
MrBobb's Avatar MrBobb
11:12 AM Liked: 39
post #3 of 6
11-17-2011 | Posts: 3,434
Joined: Sep 2008
Old info.

Lots of TV do not "passthru" 5.1 info, meaning the TV will only out 5.1 if it's coming from its tuner and nowhere else. So, just have all sources converge into the receiver then spkr and ur done.
Hamilcar Barca's Avatar Hamilcar Barca
12:59 PM Liked: 21
post #4 of 6
11-17-2011 | Posts: 662
Joined: Dec 2010
Quote:
Originally Posted by mwok View Post

I got the HTPC connected to Samsung 52" TV through HDMI.
Then the TV connects to the speakers through toslink.

This way, I can only get Stereo (Windows shows only Stereo is available for
the HDMI audio).

Here's what I think is happening.

Your HTPC is an 'HDMI source device' and your TV is an 'HDMI sink device'.
At handshake time, your TV, having only two speakers, reports that it is
prepared to accept a stereo signal. Your HTPC responds appropriately and
limits you to stereo output.

(I believe it's possible to capture the EDID (E-EDID?) on the HTPC to verify this.
I don't know how.)

Quote:
Originally Posted by mwok View Post

Instead, if I connect the PC to Denon receiver (hdmi) [...]

Your sink device for the audio, at least, is now the Denon receiver. It reports
to your HTPC that it will accept multi-channel audio.

(The connection to the TV doesn't matter here unless maybe the receiver
can simply act to 'pass' the HDMI communications to the TV. In that case,
the HTPC and TV might negotiate the same stereo signal. That's a guess
based on how some protocols other than HDMI work.)

There's one more limitation. TOSlink and S/PDIF are limited to (max out at)
5.1-channel DD and DTS.
erickotz's Avatar erickotz
02:43 PM Liked: 30
post #5 of 6
11-17-2011 | Posts: 1,131
Joined: Feb 2003
Depends on your TV. My Sony TV does not, but my Panasonic TV does.
idividebyzero's Avatar idividebyzero
03:03 PM Liked: 13
post #6 of 6
11-17-2011 | Posts: 333
Joined: Oct 2008
I had a Samsung 7000 that did. My Panasonic VT25 does not. If its a modern 7000 or 8000 series then it probably does.
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