[mythtv] ALSA not working

John Patrick Poet john at BlueSkyTours.com
Tue Jun 14 00:25:21 UTC 2005


Brian C. Huffman wrote:

>All,
>
>I sent an email a while back about problems getting ALSA to work.  I
>have OSS working in mythtv and ALSA works in both mplayer and xine, but
>I get no sound when specifying either "ALSA:default" or "ALSA:spdif"
>with or without AC3 passthrough.  I'm using the spdif outputs on an
>Maudio Delta DIO 2496.  Here's the output of 'mythfrontend --verbose
>playback,audio'
>
><snip>
>  
>

I had some trouble getting my Delta 410 to work.  Finally got it to work 
by putting:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pcm.!default {
    type plug
    slave.pcm iec958
}

pcm.ice1712 {
   type hw
   card 0
}

ctl.ice1712 {
   type hw
   card 0
}

pcm.ice1712_spdif {
    type plug
    ttable.0.8 1 # S/PDIF left...Delta 9
    ttable.1.9 1 # S/PDIF right...Delta 10
    slave.pcm ice1712
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

in my /etc/asound.conf file.  I then told Myth to use 
"ALSA:ice1712_spdif" and it worked.

The Delta410 has ten connections on it.  I don't know how many your 2496 
has.  You may need to play around with those ttable entries to find the 
right values for your card.

While struggling to get it working, I also played around with the 
envy24control tool, but I don't remember if there were any settings in 
there which needed changed.

Hope this helps.

John



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