[mythtv-users] No sound through sound card

Bruce Markey bjm at lvcm.com
Tue Dec 30 17:46:24 EST 2003


ravenel at email.unc.edu wrote:
> I installed MythTV 0.12 via KnoppMyth. However, my sound is not working.
> If I plug the speakers into my capture card (WinTV 401), I get sound,
> but if I run a cable from line out to the line in on my soundcard (an
> onboard Creative chip), I get nothing. I checked in ALSAmixer thinking
> something was wrong there, but there is nothing I can find--I followed
> all of the instructions from the MythTV website (master unmuted, line
> muted), but nothing seems to help (side note: I saw on the MythTV site
> that Capture is supposed to be muted--however, alsamixer will not allow
> me to mute it--when I press M, nothing happens: could this be causing it?).

You're right that Capture cannot be muted but this may just
be a mis-understanding. The input source (Line?) should be
marked CAPTUR and the "CAPTUR" source should be muted (rather
than "Capture"). Here's some crappy ASCII art to show what
you need:


                       CAPTUR      CAPTUR
  +--+        +--+     L+MM+R      L+--+R
  |  |        |  |      |  |        |  |
  |  |        |  |      |  |        |  |
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  |##|        |##|      |  |        |##|
  +--+        +--+      +--+        +--+
 Master  ...  PCM  ...  Line  ... <Capture>


Some cards like SBLive! may have other capture sliders such
as "AC97 Cap" or "Wave Cap" that also need to be turned up.

--  bjm



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