[mythtv-users] Soundblaster live and AC3 for MythDVD help

[Michael Segulja]

I'm having a similar problem getting AC3 to work.  I followed your 
instructions as well, and I have the same card you do.  Could you post 
your .asoundrc?  I'm pretty much clueless on what I need to do.  I'm 
getting sound out the digital output, but it seems to be only 2 
channel?  Does that make any sense?  At least here's what I'm comparing 
it to:  I have a Sony amp capable of Dolby Digital, a DirecTV/Tivo w/ 
coax digital audio connection to the amp.  The amp is set to auto-detect 
the audio stream, so when it's on a regular channel, it outputs PCM 
audio automatically.  When it's a movie channel or something with a 
Dolby Digital stream, it auto switches to Dolby Digital and lights up a 
fancy blue light so I know this is true.  With Myth, using the same 
cable and the same input on the amp, I only get 2 channel audio with it 
set to auto-detect.  That doesn't seem right?  I really don't know where 
to go from here, so I appreciate anybody's help and support.  I haven't 
attempted anything with DVD playback yet, because I'm mainly focusing on 
TV right now... one thing at a time!

Thanks,
Michael

Michael Segulja
LMD Computing Solutions, Inc.
(281) 376-8181 | Office.
(281) 300-8285 | Mobile
(281) 576-7230 | Fax
http://www.lmdcs.com

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Kyle Rose wrote:

>Gregg Farhat <3gemail at gmail.com> writes:
>
>  
>
>>I am new to Linux, and am having trouble with the ac3 part. I
>>installed myth using Jarods Guide.  Thanks.
>>I get sound using the SPDIF out on the sound blaster, but when I play
>>a dvd I get static and no sound.  Can someone send me a woking config
>>for sblive .asoundrec to get sound from my dvd surround sound if
>>possible?
>>    
>>
>
>It depends on which live card you have.
>
>First of all, OSS may work without a hitch, but I don't use it and
>haven't for several years, though at one point I did have AC3
>passthrough working with the OSS emu10k1 driver.  I'd recommend it
>before trying ALSA if you just want to get something working.
>
>If that doesn't work, or you want to try ALSA out, first install the
>latest ALSA (1.0.7?), ls /dev/snd/ and see if you have the following:
>
>controlC0
>controlC1
>controlC2
>controlC3
>hwC0D0
>midiC0D0
>pcmC0D0c
>pcmC0D0p
>pcmC0D1c
>pcmC0D2c
>pcmC0D2p
>timer
>
>If so, cat /proc/asound/card0/codec97#0/ac97#0-0.  If you have
>something like
>
>0-0/0: SigmaTel STAC9721/23
>
>Capabilities     :
>DAC resolution   : 18-bit
>ADC resolution   : 18-bit
>3D enhancement   : SigmaTel 3D Enhancement
>
>Current setup
>Mic gain         : +0dB [+0dB]
>POP path         : pre 3D
>Sim. stereo      : off
>3D enhancement   : off
>Loudness         : off
>Mono output      : MIX
>Mic select       : Mic1
>ADC/DAC loopback : off
>Extended ID      : codec=0 rev=0 AMAP DSA=0
>Extended status  : SDAC
>
>then we've got the same card and I can hook you up. :) FWIW, it took
>me about a week of tinkering to get this config to work properly, and
>while I *think* I understand it now, working with ALSA is something
>like quantum mechanics: if you look at it the wrong way, you
>irrevocably disturb the system. :)
>
>Cheers,
>Kyle
>  
>
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