[nas] [PATCH] voxware server: using different in and out devices

Erik Auerswald auerswal at unix-ag.uni-kl.de
Fri Aug 11 06:31:03 MDT 2006


On Thu, Aug 10, 2006 at 10:16:27PM -0600, Jon Trulson wrote:
> On Thu, 10 Aug 2006, Erik Auerswald wrote:
> >when using the voxware server with different input- and output-devices
> >and the server is configured to close the audio devices when no stream
> >is active, the configuration for the input-device is lost when playing a
> >stream. The attached patch fixes this.
> >
>         Applied, thanks.


> >To really use two sound cards we would need two mixer devices as well.
> >At the moment we only use sndStatOut.mixer.
>      I would think you would run a seperate server for each sound
>      device wouldn't you?

That depends. Obviously the idea of different input- and output-devices
was to circumvent the OSS half duplex drivers. Today this problem should
be solved by using ALSA drivers. I don't know if there is actually half
duplex sound hardware used in current consumer devices.

So back in the day one would want to run one NAS server making use of
two half duplex soundcards (sound blaster...) and would have to use two
mixer devices to control them. It seems noone actually did this as it is
not fully supported by the voxware server...

In my case I configured the S/PDIF out of the on-board sound as one OSS
device and the normal "analog" in/out hw as another. The sound card
mixer controls all of these devices so I don't need seperate mixers.


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