[mythtv-users] full duplex sound card
Joseph A. Caputo
jcaputo1 at comcast.net
Wed Mar 26 19:00:46 UTC 2003
Hmmm, not really sure if the WinTV GO supports btaudio... a quick search
through the mailing list appears to be inconclusive. Your best bet is to
try it yourself. In any event, this is the setup you're going for:
(example with btaudio, use device mapping from your system)
onboard sound: /dev/dsp0
btaudio: /dev/dsp1 (digital) & /dev/dsp2 (analog)
Run setup/setup, set tuner audio source to /dev/dsp1 or /dev/dsp2
In playback setup (under TV menu in mythfrontend), set sound output to
Also, set /dev/dsp0 in mythmusic-settings.txt
(example without btaudio, but with 2 sound cards)
card #1 (gets line-in from tuner card line-out): /dev/dsp0
card #2: /dev/dsp1
Run setup/setup, set tuner audio source to /dev/dsp0
In playback setup & mythmusic-settings.txt, set sound output to /dev/dsp1
In both cases, leave your onboard sound *enabled* as you will be using it!
> -----Original Message-----
> From: mythtv-users-bounces at snowman.net
> [mailto:mythtv-users-bounces at snowman.net]On Behalf Of Kaushik Mallick
> Sent: Wednesday, March 26, 2003 1:31 PM
> To: Discussion about mythtv
> Subject: RE: [mythtv-users] full duplex sound card
> Thank you for replying to my post. You were most
> I have a Hauppage WinTV GO card, model 190. WIll that
> handle btaudio?
> I was happy to hear that any normal PCI sound card
> will work as long as I have the onboard sound on as
> well. I am assuming that I do not need to disable the
> onboard sound on my motherboard. I can have the sound
> out from by WinTV card to the line-in of my
> motherboard's sound device. The PCI sound card can be
> connected to the speakers. Does that sound like the
> right configuration? Will RedHat 8.0 identify two
> sound card drivers?
> Thank you so much for your help.
> --- "Joseph A. Caputo" <jcaputo1 at comcast.net> wrote:
> > What kind of TV tuner card do you have? If it
> > supports btaudio (= direct
> > audio extraction from tuner card over the PCI bus
> > without need for patch
> > cable/duplex sound card), then that's the way to go.
> > Search the archives
> > for plenty of info on how to tell if your tuner
> > supports btaudio & if so how
> > to set it up.
> > As far as other sound cards (if btaudio is not an
> > option)... I have a
> > Hercules Fortissimo III which does full duplex, but
> > I really can't remember
> > how well since I've been using btaudio. I also have
> > a C-Media onboard chip
> > which, as you correctly stated, has horrible doing
> > duplex. FYI, if you get
> > *any* PCI sound card, then it really doesn't matter
> > if it does full
> > duplex -- since you'll have 2 sound cards (onboard &
> > separate PCI), you
> > could record with one and playback with the other.
> > That is essentially what
> > you're doing when you use btaudio, anyway. Even the
> > C-Media chip might
> > handle this; I think the hiss is only an issue when
> > the card is opened in
> > duplex mode.
> > Hope that helped.
> > -Joe C.
> > > -----Original Message-----
> > > From: mythtv-users-bounces at snowman.net
> > > [mailto:mythtv-users-bounces at snowman.net]On Behalf
> > Of Kaushik Mallick
> > > Sent: Wednesday, March 26, 2003 12:56 AM
> > > To: mythtv-users at snowman.net
> > > Subject: [mythtv-users] full duplex sound card
> > >
> > >
> > > I am the one that started the thread on
> > ringbuf1.nuv
> > > and got a lecture on RTFM.
> > > Come to find out that my problem actually has got
> > to
> > > do with full duplexing capability of the sound
> > card.
> > >
> > > I can start mythbackend fine. When I start
> > > mythfrontend, go through the setup process and
> > then
> > > choose to watch tv, mythtv hangs and I cannot even
> > get
> > > back to init3. I have to reboot my machine.
> > >
> > > Instead, if I issue mythtv (mythbackennd is
> > running) I
> > > get the following message:
> > >
> > > WARNING: Capture devie /dev/dspis not reporting
> > full
> > > duplex capability. See docs/mythtv-HOWTO, section
> > 17
> > > for more information.
> > >
> > > I am realizing that the integrated sound on my ECS
> > > K7SEM motherboard is no good for MythTV. In that
> > case,
> > > what PCI sound card does people recommend? I will
> > > imagine that a plain vanilla Sound Blaster Live
> > will
> > > be fine. And I also know that C-Media chip has
> > problem
> > > with recording hiss. Is there any other suggestion
> > > from people for an economical sound card that will
> > do
> > > the job just fine for MythTV? Thanks in advance.
> > >
> > > BTW, I checked section 17 of the docs and I don't
> > see
> > > anything on sound duplex requirement. RTFM?
> > >
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