Hammerfall channel/device routing

Hammerfall channel/device routing

[Kevin Ernste]

Hello -

I am running a Hammerfall 9652 in Alsa 0.9beta11 (under Madrake 8.1) and I am
looking for information about how to route to the varous output channels from
the command line (say, with ecasoubd or aplay).  Right now, sound goes to EVERY
channel (8 ADAT channels, AND the coaxial/SPDIF stereo).  

I would like to be able to route sounds separately, as the ADAT channels go to
an ADAT deck (limted to 48k), while the coaxial/SPDIF line goes to converters
which can handle 96k.  I would love to be able to do both.


Kevin

=====
Kevin Ernste
kevine@ecmc.rochester.edu
http://www.esm.rochester.edu/kevine

"An eye for an eye makes the whole world blind."  -MLK

__________________________________________________
Do You Yahoo!?
Yahoo! Tax Center - online filing with TurboTax
http://taxes.yahoo.com/

Re: Hammerfall channel/device routing

[Paul Davis]

>I am running a Hammerfall 9652 in Alsa 0.9beta11 (under Madrake 8.1) and I am
>looking for information about how to route to the varous output channels from
>the command line (say, with ecasoubd or aplay).  Right now, sound goes to EVER
>Y
>channel (8 ADAT channels, AND the coaxial/SPDIF stereo).  
>
>I would like to be able to route sounds separately, as the ADAT channels go to
>an ADAT deck (limted to 48k), while the coaxial/SPDIF line goes to converters
>which can handle 96k.  I would love to be able to do both.

i would love to be able to answer you (as the driver author), but this
is not at all a hammerfall specific question, and the answer is not
well documented at this time. the method is the same for all ALSA
supported devices.

if you search the archives for "ttable" you will get some clues. i am
sure that others who have done this will be able to give you better
answers.

--p

Re: Hammerfall channel/device routing

[MNTGE]

On Wed 03 Apr 2002 03:57, Kevin Ernste wrote:
> Hello -
>
> I am running a Hammerfall 9652 in Alsa 0.9beta11 (under Madrake 8.1) and
> I am
> looking for information about how to route to the varous output channels
> from
> the command line (say, with ecasoubd or aplay).  Right now, sound goes
> to EVERY
> channel (8 ADAT channels, AND the coaxial/SPDIF stereo).
>
> I would like to be able to route sounds separately, as the ADAT channels
> go to
> an ADAT deck (limted to 48k), while the coaxial/SPDIF line goes to
> converters
> which can handle 96k.  I would love to be able to do both.

You are suffering from an erroneous decision of ALSA team when it was changed 
a feature of the PCM API (0.4 to 0.5 transition): file descriptors were 
bounded up with channels, now is bounded up with cards.

Separate operation on multichannel card is easy at application level. 
However, low-level operations (i.e. routing) for each channel at kernel level 
is unnecessary complex.

Regards,