Mailing List Archive: full duplex sound card

full duplex sound card

kmallick2000 at yahoo

Mar 25, 2003, 10:55 PM

Post #1 of 5 (2805 views)

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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Re: full duplex sound card [ In reply to ]

mythtv at blacksun

Mar 26, 2003, 3:48 AM

Post #2 of 5 (2720 views)

Permalink

On Wednesday 26 March 2003 05:55, Kaushik Mallick wrote:
>
> 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.
>
You could try to get btaudio working if your capture card supports it, that
way you would only need half duplex from your sound card.

RE: full duplex sound card [ In reply to ]

jcaputo1 at comcast

Mar 26, 2003, 9:27 AM

Post #3 of 5 (2712 views)

Permalink

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@snowman.net
> [mailto:mythtv-users-bounces@snowman.net]On Behalf Of Kaushik Mallick
> Sent: Wednesday, March 26, 2003 12:56 AM
> To: mythtv-users@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?
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
> http://platinum.yahoo.com
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
>

RE: full duplex sound card [ In reply to ]

kmallick2000 at yahoo

Mar 26, 2003, 11:31 AM

Post #4 of 5 (2725 views)

Permalink

Thank you for replying to my post. You were most
helpful.

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@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@snowman.net
> > [mailto:mythtv-users-bounces@snowman.net]On Behalf
> Of Kaushik Mallick
> > Sent: Wednesday, March 26, 2003 12:56 AM
> > To: mythtv-users@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?
> >
> > __________________________________________________
> > Do you Yahoo!?
> > Yahoo! Platinum - Watch CBS' NCAA March Madness,
> live on your desktop!
> > http://platinum.yahoo.com
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users@snowman.net
> >
>
http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
> >
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
>
http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users

__________________________________________________
Do you Yahoo!?
Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
http://platinum.yahoo.com

RE: full duplex sound card [ In reply to ]

jcaputo1 at comcast

Mar 26, 2003, 12:00 PM

Post #5 of 5 (2712 views)

Permalink

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
/dev/dsp0
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!

-Joe C.

> -----Original Message-----
> From: mythtv-users-bounces@snowman.net
> [mailto:mythtv-users-bounces@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
> helpful.
>
> 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@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@snowman.net
> > > [mailto:mythtv-users-bounces@snowman.net]On Behalf
> > Of Kaushik Mallick
> > > Sent: Wednesday, March 26, 2003 12:56 AM
> > > To: mythtv-users@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?
> > >
> > > __________________________________________________
> > > Do you Yahoo!?
> > > Yahoo! Platinum - Watch CBS' NCAA March Madness,
> > live on your desktop!
> > > http://platinum.yahoo.com
> > > _______________________________________________
> > > mythtv-users mailing list
> > > mythtv-users@snowman.net
> > >
> >
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
> > >
> >
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users@snowman.net
> >
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
> http://platinum.yahoo.com
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users