[mythtv-users] MythTV sound through SPDIF
Ludmil Miltchev
ludmilmm at gmail.com
Mon Jun 4 18:20:06 UTC 2007
Eric Smith wrote:
> On 6/4/07, *Ludmil Miltchev* <ludmilmm at gmail.com
> <mailto:ludmilmm at gmail.com>> wrote:
>
> Hi to everyone!
>
> My MythTV used to work flawlessly with a stereo analog sound (2ch). I
> decided to switch to SPDIF and now when I try to watch TV, DVDs or
> listen to music (using the Internal player) I don't get any sound.
> However, I can watch videos (using MPlayer) without any problem.
>
> ===================================================================================
>
> I tried fixing the problem, using the following articles:
>
> - Configuring Digital Sound with AC3 and SPDIF
> <http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound_with_AC3_and_SPDIF
> <http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound_with_AC3_and_SPDIF>>
>
> - I get no sound from MythTV when watching TV but MythMusic and
> command-line test all work fine. What is the problem?
>
> <
> http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound#I_get_no_sound_from_MythTV_when_watching_TV_but_MythMusic_and_command
>
> -line_test_all_work_fine.__What_is_the_problem.3F>
>
> - But I want to have all my sound go to the S/PDIF connector, how
> do I
> do that?
>
> <http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound#But_I_want_to_have_all_my_sound_go_to_the_S.2FPDIF_connector.2C_how_do_I
> <http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound#But_I_want_to_have_all_my_sound_go_to_the_S.2FPDIF_connector.2C_how_do_I>
>
> _do_that.3F>
>
> =======================================================================================
>
> When I run: #> aplay -L, I get:
>
> {
> cards 'cards.pcm'
> front 'cards.pcm.front '
> rear 'cards.pcm.rear'
> center_lfe 'cards.pcm.center_lfe'
> side 'cards.pcm.side'
> surround40 'cards.pcm.surround40'
> surround41 'cards.pcm.surround41'
> surround50 ' cards.pcm.surround50'
> surround51 'cards.pcm.surround51'
> surround71 'cards.pcm.surround71'
> iec958 'cards.pcm.iec958'
> spdif 'cards.pcm.iec958'
> modem 'cards.pcm.modem'
> phoneline 'cards.pcm.phoneline'
> dmix 'cards.pcm.dmix'
> default {
> type hw
> card 0
> device 2
> }
>
> My /home/mythtv/.asoundrc file:
>
> pcm.!default {
> type hw
> card 0
> device 2
> }
>
> My /etc/asound.conf file:
>
> pcm.!default {
> type plug
> slave {
> pcm "spdif"
> rate 48000
> format S16_LE
> }
> }
>
> I added "options snd-pcm-oss dsp_map=2" at the end of my
> /etc/modprobe.conf file.
>
> In my frontend (Utilities/Setup - Setup - General) I have:
>
> Audio Output Device: /dev/adsp
> Passthrough output Device: ALSA:default
> Mixer Device: default
> Mixer Controls: PCM
>
> I also tried checkihg and unchecking the boxes next to:
> Enable AC3 to SPDIF passthrough
> Enable DTS to SPDIF passthrough
>
> ======================================================================================
>
>
> So far, I haven't been able to get the sound to work with watching TV,
> DVD or listening to music in MythTV. I tried getting a help from a
> friend who knows a lot more than me about Linux and MythTV (I am a
> newby), but he was not able to help me, either.
>
> I am running MythTV ver. 0.2 on Suse 10. My sound card is: ALi M5455
> with spdif-out (6ch).
>
> I would really appreciate any help (hints, articles, ideas, etc.)
>
> Please, let me know if you need any more info about my
> system/configuration.
>
> Thank you!
>
> Ludmil
>
>
>
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>
>
>
> I found all the asound config to be unnecessary. What ended up
> working for me was, make sure ac3 and dts passthrough are both
> enabled. And then change both the audio and passthrough output
> devices to be ALSA:iec958. That's all I needed, hopefully it will
> work for you as well.
>
>
>
>------------------------------------------------------------------------
>
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>
Hi Eric!
Thank you for your advice! It did work for playing TV and DVDs. I still
can't play music through MythTV (and I used to play it with 2ch analog
audio cable). Did you have any issues with playing music?
Thanks!
Ludmil
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