On Sat, 21 Sep 2002, Patrick Shirkey wrote:
> Florian Bomers wrote:
> > (I initially posted this to alsa-user without answers. Hope to get more lucky
> > here...)
> >
> > Hi,
> >
> > sorry for those general questions, but I wasn't able to find anything on the
> > archives or in the ALSA documentation.
> >
> > What is the meaning of devices vs. subdevices ? What is an example where a
> > device would have several subdevices, as opposed to the card having several
> > devices ?
>
> A card is a device. The available pcm channels are sub devices.
Not really. A card can have several PCM devices. Each PCM device can have
1-N PCM subdevices (where N is not limited). Note that each subdevices
should have same parameters. Mostly, subdevices are used for cards
allowing multi-open (hardware sample mixing).
> yes plughw:0,0 is the same as hw:0,0 but with automatic sample rate
> conversion.
Right.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project http://www.alsa-project.org
SuSE Linux http://www.suse.com
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