Forum Thread

5.1 HDMI audio from HD 6450?

Damocles 3,471 October 22, 2015 at 03:39 PM
I have a cheap AMD Radeon HD 6450 connected via HDMI to my TV (which passes audio to my receiver).

The spec page for the card lists multichannel 7.1 audio, but when I check my audio settings in Windows, I only see "2 speaker stereo configuration" available under the HDMI HD audio.

http://www.amd.com/en-us/products.../6000/6450
INTEGRATED HD AUDIO CONTROLLER
Output protected high bit rate 7.1 channel surround sound over HDMI or DisplayPort with no additional cables required


Am I doing something wrong? Could I be getting 5.1 even though windows says stereo only? I've updated to the latest drivers for Win 7 Home (a couple months old), and even the Beta (a couple weeks old). CCC doesn't seem to have any audio controls, it appears to be only through the Windows interface.

26 Comments

1 2

Sign up for a Slickdeals account to remove this ad.

#2
Here is a picture I have from the audio configuration of a different computer with an HD 5450 using just a headphone jack.

This is what I was expecting to see, not just stereo.

http://imgur.com/wS1xD5E
Reply Helpful Comment? 0 0
#3
i did try loading realtek audio drivers, no luck there.

and i tried listening to a 5.1 audio file, it doesn't seem to be doing 5.1.
Reply Helpful Comment? 0 0
Joined May 2004
L42: The Ultimate Answer
1,440 Posts
993 Reputation
#4
What model TV and receiver?

Make sure your TV actually supports sending 5.1 out. My older Samsung LCD doesn't.
Reply Helpful Comment? 0 0

#5
I'll assume the receiver lacks hdmi ports.

On many maybe even most tv's the optical and coax digital audio outputs only output PCM stereo. You generally need a receiver that supports HDMI and possibly a tv that supports audio return channel. If your computer has a coax or optical audio out use that or upgrade your receiver.
Reply Helpful Comment? 0 0
#6
Quote from jkee View Post :
I'll assume the receiver lacks hdmi ports.

On many maybe even most tv's the optical and coax digital audio outputs only output PCM stereo. You generally need a receiver that supports HDMI and possibly a tv that supports audio return channel. If your computer has a coax or optical audio out use that or upgrade your receiver.
yes, non-HDMI from TV to receiver, using coax digital audio out.

since my only two inputs are HTPC and Blu-ray, maybe I can find a Blu-ray that let's me test if the TV is outputting 5.1 for it. I'm getting the Disney WOW today, maybe it will include an audio test.

The TV has ARC, but that does me no good without HDMI on my receiver right?

I'd still be confused why the TV output affects whether Windows shows "stereo" or "5.1".

Thanks for the helpful tips though. I'll keep investigating.
Reply Helpful Comment? 0 0
Last edited by Damocles October 23, 2015 at 05:26 AM
#7
Quote from Damocles View Post :
yes, non-HDMI from TV to receiver, using coax digital audio out.

The TV has ARC, but that does me no good without HDMI on my receiver right?

I'd still be confused why the TV output affects whether Windows shows "stereo" or "5.1".
Yes, you'd need a receiver with HDMI to utilize ARC.

HDMI devices can detect what's connected. If you had a receiver with ARC connected, it would show as 5.1 or similar. On many TV's the only time they output 5.1 over optical/digital coax is when the internal tuner is in use. The TV is performing a conversion on the audio signal from the source (or it negotiates what audio format the source should provide, I don't remember which) before it outputs stereo over the digital output

If you want surround, use a digital audio output directly from the computer or upgrade your receiver.
Reply Helpful Comment? 0 0
Last edited by jkee October 23, 2015 at 11:24 AM
Joined Feb 2004
L10: Grand Master
6,951 Posts
944 Reputation
#8
Quote from Damocles View Post :
I have a cheap AMD Radeon HD 6450 connected via HDMI to my TV (which passes audio to my receiver).

The spec page for the card lists multichannel 7.1 audio, but when I check my audio settings in Windows, I only see "2 speaker stereo configuration" available under the HDMI HD audio.

http://www.amd.com/en-us/products.../6000/6450
INTEGRATED HD AUDIO CONTROLLER
Output protected high bit rate 7.1 channel surround sound over HDMI or DisplayPort with no additional cables required


Am I doing something wrong? Could I be getting 5.1 even though windows says stereo only? I've updated to the latest drivers for Win 7 Home (a couple months old), and even the Beta (a couple weeks old). CCC doesn't seem to have any audio controls, it appears to be only through the Windows interface.
Quote from Damocles View Post :
Here is a picture I have from the audio configuration of a different computer with an HD 5450 using just a headphone jack.

This is what I was expecting to see, not just stereo.

http://imgur.com/wS1xD5E
Post a pic of your current sound devices as seen by Windows. Also, what mobo do you have? My initial thought was that you are configuring the onboard HDMI and not the GPU HDMI...
Reply Helpful Comment? 0 0
Marshall: Have the rest of you guys figured out by now that mmathis is the smartest guy on SlickDeals?

Sign up for a Slickdeals account to remove this ad.

#9
What is the model of your tv?
Reply Helpful Comment? 0 0
#10
i'm not at home right now. here is the info i recall:

TV: the 65" 4k RCA that was posted on SD recently. very little information online. only coax out, not optical.
Video card: AMD Radeon HD 6450 from SD
PC: Lenovo M57 from SD
Mobo: ?
Receiver: Onkyo HT-R530 from SD (part of the HT-S780 theater package with speakers, etc)

I'll try running audio out from PC to receiver just to see if it does anything different.
Reply Helpful Comment? 0 0
Last edited by Damocles October 23, 2015 at 01:12 PM
#11
Quote from Damocles View Post :
TV: the 65" 4k RCA that was posted on SD recently. very little information online. only coax out, not optical.
Found the TV manual: http://www.brandsmartusa.com/pdfs...198105.pdf
Appears to be made by On Corporation.

Doesn't say if it can output 5.1. There is a setting in the menus for digital audio out, options are: off, pcm, and raw. Try switching it to raw.
Reply Helpful Comment? 0 0
#12
that's funny, i looked up PCM and it said "the rawest form of digital audio." but i switched to "raw" and it didn't change anything. i noticed my receiver says "PCM" on every listening mode. could that matter?

i'll explore more tomorrow morning, but my PC has only 3.5 mm stereo out, so that's my only option for direct to receiver, which is why i was hoping for HDMI audio. i'll try blu-ray tomorrow and see if the TV narrows it to 2.0.

when you listen to this 5.1 WMA, does every sound come from just one speaker at a time? that's my test.
http://www.lynnemusic.com/surroun...d_test.wma
Reply Helpful Comment? 0 0
Last edited by Damocles October 23, 2015 at 05:27 PM
#13
A Blu-Ray disc contains audio in PCM, AC-3, and DTS formats. PCM is uncompressed, and can technically include up to 8 channels but typically only 2 channels are present.

The S/PDIF spec only supports 2 channels of un-compressed PCM audio or up to 7.1 in a compressed format like DTS or AC-3
Reply Helpful Comment? 0 0
#14
yeah, i guess i'm either going to have to get a new HDMI receiver or deal with "simulated" 5.1 audio. that stinks. neither of my BR players have optical out either.
Reply Helpful Comment? 0 0
#15
if the TV supports ARC, will any HDMI receiver work, or does the receiver also have to support ARC?
Reply Helpful Comment? 0 0
Page 1 of 2
1 2
Join the Conversation
Add a Comment
 
Copyright 1999 - 2016. Slickdeals, LLC. All Rights Reserved. Copyright / Infringement Policy  •  Privacy Policy  •  Terms of Service  •  Acceptable Use Policy (Rules)  •  Interest-Based Ads
Link Copied to Clipboard