Mailing List Archive: AverTV Studio no sound

AverTV Studio no sound

Mar 30, 2003, 6:54 PM

Post #1 of 5 (2942 views)

Hi All,

I'm trying to set up a new MythTV system based around an AverTV Studio
card. The video seems to be working pretty well, but I'm stuck on the
audio.

Basic specs on my system:

PIII-600
256 MB
Matrox G200
AverTV Studio
RH 8.0, fully updated
ALSA

I don't expect superlative video performance given the slow CPU, but the
audio is proving difficult.

Specifically the problem is that there is no sound coming from the video
capture card. I've verified this by plugging my computer speakers directly
into the AverTV Studio card's output: nothing comes out. The same hardware
system, running under Windows 98, and the Aver-supplied TV viewing software
works fine: audio comes from the output jack of the card as expected.

Back in the Linux world, running "radio" creates sound on the card output
jack as expected (and drives the FM tuner section just fine), so I'm
inclined to think that there's something wrong with the software
configuration for the video card.

Any suggestions?

Cheers,

- pz.

--
John Pezaris, Ph.D.
pz@hms.harvard.edu

Re: AverTV Studio no sound [ In reply to ]

pml4791 at yahoo

Mar 30, 2003, 8:21 PM

Post #2 of 5 (2894 views)

Permalink

--- "Dr. J. S. Pezaris" <pz@hms.harvard.edu> wrote:
> Hi All,
>
> I'm trying to set up a new MythTV system based
> around an AverTV Studio
> card. The video seems to be working pretty well,
> but I'm stuck on the
> audio.

Sounds like your bttv driver might be picking the
wrong
card type. When bttv loads what card does it say it
is autodetecting? From reading I think the AverTV
cards are card types 6, 13 or 41. My AverTV studio
gets autodetected as 41 using a recent gentoo install
and that seems to work fine for me. If memory serves
13 also worked well. As much as I looked I could never
find a definitive answer as to which one to use. You
can force bttv to use a specific card type by adding
the line
options bttv card=13
to your /etc/modules.conf file.

--
patrick

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RE: AverTV Studio no sound [ In reply to ]

thormj at ieee

Mar 31, 2003, 5:07 AM

Post #3 of 5 (2897 views)

Permalink

> I'm trying to set up a new MythTV system based
> around an AverTV Studio
> card. The video seems to be working pretty well,
> but I'm stuck on the
> audio.

For my AverTV Studio, I need to use the audiomux
option, otherwise I get the SAP channel.
bttv audiomux=4,4,8,4,0

I don't know how it affects non-tuner inputs because
I haven't used them yet.

-Thor Johnson

RE: AverTV Studio no sound [ In reply to ]

pml4791 at yahoo

Mar 31, 2003, 9:38 PM

Post #4 of 5 (2903 views)

Permalink

--- Thor Johnson <thormj@ieee.org> wrote:
> > I'm trying to set up a new MythTV system based
> > around an AverTV Studio
> > card. The video seems to be working pretty well,
> > but I'm stuck on the
> > audio.
>
> For my AverTV Studio, I need to use the audiomux
> option, otherwise I get the SAP channel.
> bttv audiomux=4,4,8,4,0
>
> I don't know how it affects non-tuner inputs because
> I haven't used them yet.
>
> -Thor Johnson

I also have to use an audiomux parameter but I am
using
options bttv audiomux=0xff44e gbuffers=32
I found that suggestion on the web in a couple of
places. The symptom that I was having was MythTV
locking up on channel changes before I put this
options line in modules.conf. I was convinced I had
an audio driver/hardware problem and worked on that
assumption for a few days before I finally decided to
move on to troubleshooting my AverTV setup.
--
patrick

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RE: AverTV Studio no sound [ In reply to ]

pz at hms

Apr 6, 2003, 11:56 AM

Post #5 of 5 (2884 views)

Permalink

From: "Thor Johnson" <thormj@ieee.org>
Subject: RE: [mythtv-users] AverTV Studio no sound

> I'm trying to set up a new MythTV system based around an AverTV Studio
> card. The video seems to be working pretty well, but I'm stuck on the
> audio.

For my AverTV Studio, I need to use the audiomux
option, otherwise I get the SAP channel.
bttv audiomux=4,4,8,4,0

Hi Thor,

It turns out I had this same problem, but didn't realized until I watched a
station with differing normal and SAP channels. Thanks for the pointer!

- pz.

--
John Pezaris, Ph.D.
pz@hms.harvard.edu