[mythtv-users] Fwd: Digital Audio on HDMI MB not working

Andrew Close aclose at gmail.com
Tue Jan 20 15:33:37 UTC 2009

On Tue, Jan 20, 2009 at 9:14 AM, Joe Henley <joehenley at kc.rr.com> wrote:
> Phil,
> You should check with the vendor of your sound card/chip about the output
> frequency capabilities.  Many do not output at 44.1K; instead defaulting to
> 48K.  (44.1 is the norm for CD rom music, 48K is the norm for digital
> music.)
> I spent many hours trying to get a Via sound chip to output 44.1K only to
> learn the chip was hard wired on my mobo to only output at 48K.  The Via
> folks thought that it was "close enough."  I ended up having to buy a sound
> card and disabling the sound chip on the  mobo.  You can find alot of info
> on the problem by googling "bit perfect audio."

Joe,  here's the marketing fluff for Phil's mobo/audio:

 High Definition Audio
Enjoy high-end sound system on your PC!
The onboard 8-channel HD audio (High Definition Audio, previously
codenamed Azalia) CODEC enables high-quality 192KHz/24-bit audio
output, jack-sensing feature, retasking functions and multi-streaming
technology that simultaneously sends different audio streams to
different destinations. You can now talk to your partners on the
headphone while playing a multi-channel network games. All of these
are done on one computer.

S/PDIF-out on Back I/O Port
This motherboard provides convenient connectivity to external home
theater audio systems via coaxial (mid-board) and optical S/PDIF-out
(SONY-PHILIPS Digital Interface) jacks. It allows to transfer digital
audio without converting to analog format and keeps the best signal

and here's the text from the Specification page (which seems less
relevant than the marketing fluff):

Realtek(R) ALC1200 8 -Channel High Definition Audio CODEC
Optical S/PDIF out port at back I/O
Support Jack Detection and Multi-streaming
DTS Surround Sensation UltraPC

Andrew Close

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