[mythtv-users] Alsa: duplicate output to SPDIF?

[Mark Wormgoor]

Hi,

Just to let you all know that I managed to get this working on my MythTV
system.  First of all, use this asoundrc:
http://astron.berkeley.edu/~mperrin/software/.asoundrc

But, this will give you xrun errors in mplayer.  I haven't figured out how
to do the rate conversion in the asoundrc yet, because you cannot use the
dmix plugin in this configuration.  But, you can force mplayer to output
48kHz sound and if you do, it works great!

The downside, MythTV crashed as soon as I enabled ALSA for sound output
with this asoundrc and MythMusic (the real reason I want this!) doesn't
even support alsa in 0.16.

Kind regards,

Mark

Dave Packham said:
> I know that this is possaible to duplicate the analog/spdif output.  To
> test this I installed Windows XP on my myth server (on a clean HD) and
> installed some windows PVR softwares like Snapstream and GBpvr and a few
> others.  They all had no problem with simultaneous playback on both the
> spidf optical out AC3 information and the analog thru the TV speakers.
>
> So I know that my hardware most likely yours can handle it... We just
> need to figure out HOW to setup ALSA to give it to us
>
> Dave P
>
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Mark Wormgoor
> Sent: Friday, November 19, 2004 4:40 AM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] Alsa: duplicate output to SPDIF?
>
> Hi,
>
> You cannot connect your dvd-rom to the spdif.  Your dvd software player
> will read the ac3 or dts track from your dvd.  It is up to the dvd
> software player to send that sound out through the correct sound output
> device, either spdif or analog.  You can use your .asoundrc and your
> mplayer commandline (or /etc/mplayer.conf or ~/.oglerc) to configure
> that.
>
> Kind regards,
>
> Mark
>
> Phill Edwards said:
>> This doesn't answer your question so I apologise in advance (and it's
>> a bit off topic). My mobo has a SPDIF connector but I don't understand
>
>> how to connect it all up to the Liteon DVD-ROM. I asked them about
>> this in a shop and they didn't have a clue about what cables I needed.
>
>> Is there a special type of cable you need to buy to connect DVD-ROM to
>
>> the SPDIF port on the mobo? And then when they are connected does it
>> just automatically feed the sound to the on-board sound card?
>>
>> Regards,
>> Phill
>> ----- Original Message -----
>> From: "Mark Wormgoor" <mark at wormgoor.com>
>> To: <mythtv-users at mythtv.org>
>> Sent: Friday, November 19, 2004 8:17 PM
>> Subject: [mythtv-users] Alsa: duplicate output to SPDIF?
>>
>>
>>> Hi,
>>>
>>> I am reading into alsa, but still haven't been able to find out if
>>> this is possible (and what plugin I would need).  I am using this
>>> .asoundrc at the
>>> moment: http://www.mythtv.info/moin.cgi/DigitalSoundHowTo, which
>>> works just fine.  The dvd-player (Ogle) sends output over spdif to my
>
>>> stereo and everything else goes straight to the tv.
>>>
>>> But... I would like to send analog signals to both my tv and my
>>> stereo, so I don't have to leave the tv on when I select an internet
>>> radio or an
>>> mp3
>>> list (and it sounds better over the stereo as well).
>>>
>>> I have tried this .asoundrc
>>> (http://astron.berkeley.edu/~mperrin/software/.asoundrc), but it will
>
>>> give me stuttering sound on my tv (haven't listened to the stereo
>>> with this yet).
>>>
>>> Kind regards,
>>>
>>> Mark
>>> --
>>> ***************************************************************
>>> * |\    /|      |  /|  /       Mark Wormgoor                  *
>>> * | \  / |      | / | /        mailto:mark at wormgoor.com       *
>>> * |  \/  |ark   |/  |/ormgoor  http://www.wormgoor.com/mark/  *
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>
>
> --
> ***************************************************************
> * |\    /|      |  /|  /       Mark Wormgoor                  *
> * | \  / |      | / | /        mailto:mark at wormgoor.com       *
> * |  \/  |ark   |/  |/ormgoor  http://www.wormgoor.com/mark/  *
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-- 
***************************************************************
* |\    /|      |  /|  /       Mark Wormgoor                  *
* | \  / |      | / | /        mailto:mark at wormgoor.com       *
* |  \/  |ark   |/  |/ormgoor  http://www.wormgoor.com/mark/  *
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