[mythtv-users] Audio isn't working in MythTv, but it is in TvTime

Nick Morrott knowledgejunkie at gmail.com
Sat Jan 27 09:10:47 UTC 2007

On 27/01/07, Jason Barnett <jbarnett74 at hotmail.com> wrote:
> I believe my tv card may not do audio encoding, but I do have a cable from
> my tv card to the line in of my audio card.  Again, I've tested my
> configuration using TvTime and that both video and sound work fine.  I'm
> using the saa7134 driver, with options set to card=65 and tuner=54
> My sound card is an onboard Nvidia CK804 with the Realtek ALC850 rev 0
> chipset (according to the headings in ALSA Mixer).  It's integrated with the
> Abit KN8 Ultra motherboard I'm using.  I am using the line out to desktop
> speakers.

Quoting from Jarod's Fedora HOWTO:

"Unlike the PVR-x50s, which mux audio in with the video stream into
mpeg2 files, I needed an audio jumper cable from the sound out on the
TV card to the line in on my sound card. This is all well and good for
xawtv, but you need to make a few quick tweaks for use with MythTV.
Open up your sound mixer (Fedora/Red Hat menu → Sound & Video → Volume
Control) and mark the check boxes for Mute and Record for the Line In
on your sound card. Now when you try xawtv, you'll get no sound, but
when you fire up MythTV, everything will be gravy."

This might make everything suddenly work, or it might mean that MythTV
is controlling the wrong mixer control. What audio device have you
configured in your capture card settings in mythtv-setup?

> When I run "dmesg | grep saa7134" I get:
> "saa7134 IR (V-Stream Studio TV  as /class/input/input4"

That's letting you know the infra-red receiver on the TV card is being
recognised as an input device. Nothing to do with your audio problems,
but good to know it's there :)

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