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General => Installation issues => Topic started by: jeff_rigby on September 21, 2007, 10:12:39 PM

Title: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: jeff_rigby on September 21, 2007, 10:12:39 PM
Linux MCE works properly and routes audio through the audio out selected using the AV wizard.  Myth TV only outputs through the computer audio out port. There is no audio out the optical or spdif port.  How do I setup Myth tv to output sound through the digital audio out port?

Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: teedge77 on September 21, 2007, 10:14:56 PM
what card are you using?
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: jeff_rigby on September 21, 2007, 10:27:28 PM
I don't think that should matter as the sound works properly with LinuxMCE, the problem is that MythTV is not setup properly for sound output.

The sound chip I'm using is built onto the mother board of a M2NPV-VM, one of the recommended boards.  I purchased the daughter board ($16) that provides optical and coax PCM output (dolby digital). This is hooked to my home stereo.  The sound is very good when playing a DVD or audio and non-existant when playing MythTV. 

I'm using the component out port at 480P or 780P but I get digital sparkles in the background on dark images.  HDMI or DVI is the way to go.
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: teedge77 on September 21, 2007, 10:36:45 PM
oh....nevermind then i guess....
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: rwilson131 on September 21, 2007, 10:40:19 PM
Take a look at this page in the MythTV wiki and go to the question and answers for a possible solution.
http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound

Thanks,

Rob
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: scorf on September 23, 2007, 01:29:05 AM
I'm having the exact same problem.

MB: ASUS M2NPV-VM
Sound card: Built in with the daughter board that provides optical out
Tuner: PVR-150

I'm trying things from the Configuring_Digital_Sound link provided above but nothing has worked yet.

I'll keep working on it and let you know what I discover -- if you come up with a solution, please advise.  I'm sure we're not the only two.
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: jeff_rigby on September 23, 2007, 06:46:09 PM
This might be a stupid question.  I have a core and two remote Media Directors which have the M2NPV-VM motherboards with integrated sound.  If I choose the option to go to the desktop on this MD and configure sound will the setting be saved for a future reboot of this media director.  Or must I go to the administration website to change these options for this MD?
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: jeff_rigby on September 24, 2007, 02:14:17 PM
Just did my homework and Linuxmce admin page has options for sound output and these are correctly set for it to work as confirmed using the audio video wizard.  MythTV has no settings in the Admin page (that I can find).  So while the above suggestion might work for a core/MD combo it won't work for the diskless MD.
Title: Re: No sound when using Myth TV out of the Digital audio, DVD's play perfectly
Post by: tkmedia on September 26, 2007, 06:05:08 PM
Try running alsamixer and unmute all inputs I think mine was IEC958, and was muted when unmuted Mythtv  has sound.


Good luck


Tim
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