BT878 support.

BT878 support.

[Rodrigo Severo]

Dear List/Clemens,


I have two Prolink PlayTV Pro capture cards (PV-BT878P+). One of them is 
revision 8E and tthe other is revision 9F.

I tried to use both of them with the snd-bt87x driver. Both of them 
returned only static.

I managed to get analog sound from the 8E with the btaudio (OSS) driver, 
but the 9F returned only silence.

What could be done to extend snd-bt87x support for both of them?

I can send any info I have on the boards and debug info. I can also 
test/compile any code if anyone is interested.


Thanks in advance for your attention,

Rodrigo Severo


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Re: BT878 support.

[Clemens Ladisch]

Rodrigo Severo wrote:
> I have two Prolink PlayTV Pro capture cards (PV-BT878P+). One of them is
> revision 8E and tthe other is revision 9F.
>
> I tried to use both of them with the snd-bt87x driver. Both of them
> returned only static.

Probably different mixer settings?

> I managed to get analog sound from the 8E with the btaudio (OSS) driver,

Which version?


Regards,
Clemens




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Re: BT878 support.

[Rodrigo Severo]

Clemens Ladisch wrote:

>Rodrigo Severo wrote:
>
>
>>I have two Prolink PlayTV Pro capture cards (PV-BT878P+). One of them is
>>revision 8E and tthe other is revision 9F.
>>
>>I tried to use both of them with the snd-bt87x driver. Both of them
>>returned only static.
>>
>>
>
>Probably different mixer settings?
>
>
I tried all options. The bt87x mixer has just few options.

>
>
>>I managed to get analog sound from the 8E with the btaudio (OSS) driver,
>>
>>
>
>Which version?
>
>
ALSA 1.0.4 and btaudio which came with kernel 2.4.25.

Do you need any extra info from the boards?


Rodrigo

--
----------------------------------------------------
Rodrigo Severo
Fábrica de Idéias
Fone: +55(61)321 1357
Fax: +55(61)223 1712
SBS - Quadra 2 - Ed. Empire Center - Sala 1301
Brasília/DF - Brasil
CEP: 70.070-904
----------------------------------------------------



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Re: BT878 support.

[Clemens Ladisch]

Rodrigo Severo wrote:

> Clemens Ladisch wrote:
>
> >Rodrigo Severo wrote:
> >
> >>I have two Prolink PlayTV Pro capture cards (PV-BT878P+). One of them is
> >>revision 8E and tthe other is revision 9F.
> >>
> >>I tried to use both of them with the snd-bt87x driver. Both of them
> >>returned only static.

Did you try analog or digital or both?

> >>I managed to get analog sound from the 8E with the btaudio (OSS) driver,

Does digital work?

> >Which version?
> >
> ALSA 1.0.4 and btaudio which came with kernel 2.4.25.

In theory, btaudio and snd-bt87x should behave identically.
What btaudio mixer settings and input do you use when it works?


Regards,
Clemens




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Re: BT878 support.

[Rodrigo Severo]

Clemens Ladisch wrote:

>Rodrigo Severo wrote:
>
>
>
>>Clemens Ladisch wrote:
>>
>>
>>
>>>Rodrigo Severo wrote:
>>>
>>>
>>>
>>>>I have two Prolink PlayTV Pro capture cards (PV-BT878P+). One of them is
>>>>revision 8E and tthe other is revision 9F.
>>>>
>>>>I tried to use both of them with the snd-bt87x driver. Both of them
>>>>returned only static.
>>>>
>>>>
>
>Did you try analog or digital or both?
>
>
Both.

>
>
>>>>I managed to get analog sound from the 8E with the btaudio (OSS) driver,
>>>>
>>>>
>
>Does digital work?
>
>
No. I get only silence from the digital device.

>
>
>>>Which version?
>>>
>>>
>>>
>>ALSA 1.0.4 and btaudio which came with kernel 2.4.25.
>>
>>
>
>In theory, btaudio and snd-bt87x should behave identically.
>
>
I thought so.

>What btaudio mixer settings and input do you use when it works?
>
>
The default setting, i.e. the ones set when the driver is modprobed,
work just fine.

Yesterday I was doing some extra tests. With aumixer I get three
connections under btaudio: Line[1-3].

The audio capture works just the same no matter which device I set as
the record device. The volume control affects the recording though (I
have to leave the volume level really low not to get any noticeable
distortion).

BTW, I have tested two other boards: a very old board autodetected by
bttv as "(Askey Magic/others) TView99 CPH05 x [card=24], PCI subsystem
ID is 144f:3002" and another Prolink PlayTV Pro, this time revision 9D.

With the Askey Magic I got only silence but with the Prolink PlayTV Pro
revision 9D I got bad sound with btaudio. By bad I mean a slightly high
pitch soundI got the sound of the TV with a slightly higher pitch than
usual and with more than usual noise during silence. The sound was bad
but at least I got something.

Today I found another BT878 board for sell here in Brasilia: Pinnacle
PCTV. I could have tested it also but I got lazy. The store I found all
these boards are a little distant from my work and I have already tested
5 different boards.

Do you think there is any chance for these boards to work with btaudio
and/or snd-bt87x?

BTW, is there some kind of list with boards that work with btaudio
and/or snd-bt87x?



Thanks again for your attention,

Rodrigo Severo


--
----------------------------------------------------
Rodrigo Severo
Fábrica de Idéias
Fone: +55(61)321 1357
Fax: +55(61)223 1712
SBS - Quadra 2 - Ed. Empire Center - Sala 1301
Brasília/DF - Brasil
CEP: 70.070-904
----------------------------------------------------



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This SF.Net email is sponsored by Sleepycat Software
Learn developer strategies Cisco, Motorola, Ericsson & Lucent use to deliver
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Re: BT878 support.

[Clemens Ladisch]

Rodrigo Severo wrote:
> With the Askey Magic I got only silence but with the Prolink PlayTV Pro
> revision 9D I got bad sound with btaudio. By bad I mean a slightly high
> pitch soundI got the sound of the TV with a slightly higher pitch than
> usual and with more than usual noise during silence. The sound was bad
> but at least I got something.
>
> Do you think there is any chance for these boards to work with btaudio
> and/or snd-bt87x?

The driver supports the functionality that is implemented by the BT878
chip.  If a card has some extra hardware for amplifying/routing/etc.
that needs to be configured, the driver doesn't know about this.

It would be possible to add this hardware-specific support if there
would be some documentation about it.

> BTW, is there some kind of list with boards that work with btaudio
> and/or snd-bt87x?

My Hauppauge WinTV works.  It seems most other cards have added
features that must be configured explicitly.


Regards,
Clemens




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