Hi all,
On Sun, Apr 17, 2022 at 09:13:50PM -1000, Joel Roth wrote:
> Hi Jeanette,
>
> On Mon, Apr 18, 2022, Jeanette C. wrote:
> > Hi Joel,
> > this is more informed guess work, so take it with a pinch of salt, but it
> > maybe worth the effort.
> >
> > First try to create a plug device for your HDMI:
> > pcm.my_hdmi {
> > type plug
> > salve { plughw:CARD=PCH,DEV=3 }
> > }
> >
> > Now create your !default with dmix:
> > pcm.!default {
> > type dmix
> > slave { my_hdmi }
> > }
> >
> > Perhaps you can even shorten it to putting the
> > plughw:CARD=PCH,DEV=3
> > inside the default dmix device.
>
> To review, the following plays through TV speakers:
> aplay tmh.wav -D plughw:CARD=PCH,DEV=7
>
> With the .asoundrc below,
>
> aplay tmh.wav
>
> results in:
>
> ALSA lib pcm_direct.c:2079:(snd1_pcm_direct_parse_open_conf) Unique IPC key is not defined
> aplay: main:830: audio open error: Invalid argument
>
> I get this same error even after specifying ipc_key in .asoundrc:
>
> pcm.hdmi_out {
> type plug
> ipc_key 5641 # inserting this line, and using various values doesn't help
> slave { plughw:CARD=PCH,DEV=7 }
> }
>
> pcm.!default {
> type dmix
> slave { pcm "hdmi_out" }
> }
>
> > I know that getting all this to work with Firefox and GUI can be cumbersome.
> > Perhaps pulse might be in the way, but I know much less about Pulse than
> > ALSA. Still the plughw, which converts samplerates may help.
>
> I believe firefox will honor the !default setting.
I found a solution in alsa-user mailing list archives
pcm.!default {
type asym
playback.pcm "plughw:CARD=PCH,DEV=7"
}
Thanks for your interest.
--
Joel Roth
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