Re: opening control devices with "hw:N,M"

[Takashi Iwai <tiwai@suse.de>]

At Sat, 20 Jul 2002 09:08:29 +0200 (CEST),
Jaroslav wrote:
> 
> On Fri, 19 Jul 2002, Takashi Iwai wrote:
> 
> > At Thu, 18 Jul 2002 09:03:26 -0400,
> > Paul Davis wrote:
> > > 
> > > why doesn't this work:
> > > 
> > >     snd_ctl_open (&handle, "hw:0,0", ...)
> > > 
> > > it means that you can't use the same standard name format for control
> > > devices as PCM devices, which is a bit of problem for programs that
> > > need to open both but only want to require the user to specify a
> > > single name ...
> > 
> > do you suppose that the second argument of ctl name is always ignored?
> > the control interface has no device like pcm.
> > 
> > but it's true that having a same naming rule makes the life easier...
> 
> The 'default' is there for this purpose. Otherwise, application / user 
> must know the right device name.

iirc, it's not easy to pass the card/device number to "default" pcm.
at least, "default:CARD=1" doesn't work.  the easiest way to access a
certain card is, so far, only to use "hw:x".
this must be fixed.

also, i thought that ctl.hw is defined purely in
/usr/share/alsa/alsa.conf, and tried to redefine this to accept more
arguments.  but it doesn't change anything.  is ctl.hw hardcoded?


Takashi


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