[vdr] Re: AC3 over Soundcard (live and replay) (Was: AC3 5.1 - can someon

["Christian Jacobsen" <christian.jacobsen@stageholding.de>]

Hallo Werner,

I spent a little some time yesterday testing again with vanilla 1.1.20 + dvb
08.12.02 + bitstream plugin + 1.1.20 audio patch (and alsa-lib patch but
nothing else).
I then had no problem with muted Audio any longer so maybee it was the AIO -
didn't have more time to test :(

I also played some more recordings and sometimes it does not have any
Audio - even when the recording has AC3.
I will try to find a way to reproduce it and then send you some logile next
time.

> >> What Card do you have ?
>
> OnBoard 4xsound C-Media PCI CMI8738 Model 033, there is a 2x8 pin
> connector
> block with pin 3 empty:
>
>   Left AUX in     1  2   Right AUX in
>   Empty           3  4   Ground
>   S/P-DIF in      5  6   Ground
>   S/P-DIF out     7  8   Ground

So I presume that you connect pin 7 to the coax SPDIF in on you reciver or
you have built an Optical module. And J2-pin4 of the DVB-s is connected to
pin5 - right ?

> I suppose you've an extension board is connected to this block,
> some extension boards have a jumper for getting internal
> S/P-DIF in from a further 2pin connector instead from the external
> optical/coax plugs of the extension board.

That's exactly what I have got :)

>> What i don't understand is that you set "IEC958 loop" on (unmute !?) -
>as
>> far as I remember that caused no SPDIF sound at all when I tried that ?
>
> If "IEC958 loop" is on the card expect data from S/P-DIF in and therefore
> the S/P-DIF out is active which may be noticed by your Sony and it
switches
> automatically to digital (silence) PCM.

Yes that's right, I remember that my Sony switched over to Digital.

So if I understand this right, "loop" means :
take the signal from SPDIF in and send it to SPDIF out ?

If that is so, that might be the information that I have been searching for
:))


>> In you mute.sh I see that you have an "IEC958 Output Switch" - I don't
>> remeber seeing this on my card.
>>
>> I am really not sure which controls I have to use to get this working !?
>> What controls are for the Optical and what is for Digital-Coax ?
>
> Try out
>    alsamixer
> on console to get familiar with your sound card.

I have spent quite some time "together" with alsamixer - but never got it
working :(


What alsa-Driver/lib/util/tools version are you using ?
What (SuSE) linux Version ?


Here below is the output of "amixer controls" and as I said there is no
"IEC958 Output Switch" :(

Is 'IEC958 In Select' or 'IEC958 In Valid' the same as "IEC958 Output
Switch"?

Would be nice if you could give me a tipp :))

Thanks a lot :)
Christian

#amixer controls

numid=30,iface=MIXER,name='IEC958 5V'
numid=29,iface=MIXER,name='IEC958 Copyright'
numid=32,iface=MIXER,name='IEC958 In Monitor'
numid=37,iface=MIXER,name='IEC958 In Phase Inverse'
numid=38,iface=MIXER,name='IEC958 In Select'
numid=28,iface=MIXER,name='IEC958 In Valid'
numid=34,iface=MIXER,name='IEC958 Playback Con Mask',device=2
numid=33,iface=PCM,name='IEC958 Playback Default',device=2

numid=39,iface=CARD,name='Joystick'
numid=40,iface=CARD,name='Modem'
numid=1,iface=MIXER,name='Master Playback Volume'
numid=2,iface=MIXER,name='3D Control - Switch'
numid=3,iface=MIXER,name='PCM Playback Volume'
numid=5,iface=MIXER,name='PCM Capture Switch'
numid=7,iface=MIXER,name='Synth Playback Switch'
numid=6,iface=MIXER,name='Synth Playback Volume'
numid=8,iface=MIXER,name='Synth Capture Route'
numid=26,iface=MIXER,name='Line-In As Rear'
numid=13,iface=MIXER,name='Line Playback Switch'
numid=12,iface=MIXER,name='Line Playback Volume'
numid=14,iface=MIXER,name='Line Capture Route'
numid=10,iface=MIXER,name='CD Playback Switch'
numid=9,iface=MIXER,name='CD Playback Volume'
numid=11,iface=MIXER,name='CD Capture Route'
numid=22,iface=MIXER,name='Mic Boost'
numid=16,iface=MIXER,name='Mic Playback Switch'
numid=15,iface=MIXER,name='Mic Playback Volume'
numid=17,iface=MIXER,name='Mic Capture Switch'
numid=23,iface=MIXER,name='Mic Capture Volume'
numid=18,iface=MIXER,name='PC Speaker Playback Volume'
numid=20,iface=MIXER,name='Aux Playback Switch'
numid=19,iface=MIXER,name='Aux Playback Volume'
numid=21,iface=MIXER,name='Aux Capture Switch'
numid=24,iface=MIXER,name='Exchange DAC'
numid=25,iface=MIXER,name='Four Channel Mode'



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