[LAU] Output to 2 sound cards simultaneously

[Lee Revell]

On 9/27/07, Mark Constable <markc at renta.net> wrote:
> I've read this a couple of times over the years but it still
> does not make much sense (to me)...
>
>  http://alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html
>
> As a baseline, say I started with this, where could I go
> from here to get an app (ie; Amarok) to play back out two
> soundcards at once ?
>

It's one of those things that seems like it should be easy but is in
fact nearly impossible.  The problem is that the sound cards cannot be
kept in sync on the hardware level.

Lee