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Date:      03 Nov 2002 10:23:05 -0600
From:      Craig Boston <craig@meoqu.gank.org>
To:        Michael Nottebrock <michaelnottebrock@gmx.net>
Cc:        john_m_cooper@yahoo.com, freebsd-stable@FreeBSD.ORG
Subject:   Re: creative sound card
Message-ID:  <1036340589.83862.29.camel@aldaris2.auir.gank.org>
In-Reply-To: <3DC3FD58.7030001@gmx.net>
References:  <3DC322FE.B3DE539@boonwee.per.sg>	<1036200624.44375.2.camel@PC016247.reshall .uidaho.edu> <3DC36260.28F1C226@boonwee.per.sg>	<1036217550.384.9.camel@PC016247.reshall .uidaho.edu> 	<3DC3981C.2010607@gmx.net> <1036248717.384.15.camel@PC016247.reshall.uidaho.edu>  <3DC3FD58.7030001@gmx.net>

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On Sat, 2002-11-02 at 10:29, Michael Nottebrock wrote: 
> I can really recommend running 'dual-headed' sound, all you need is a 
> second pair of speakers or a small hardware mixer and you get two 
> independent inputs/outputs, with independent mixers, which you can use 
> for all sorts of nice things, especially if you cannot or do not want to 
> run things like artsd or esound, but still want to, for example, hear 
> notification bells from an instant messenger and listen to mp3s in xmms 
> at the same time.
sysctl -w hw.snd.pcm0.vchans=4 
;) 

You don't get individual volume controls like multiple real sound cards,
and may have to manually MAKEDEV dsp0.x, but I've found it works pretty
well for running apps that don't support esd or don't work very well
with it (like mplayer or the linux-mozilla flash plugin).  I also use it
with XMMS to avoid the esound latency issues that screw up the
visualization. 

hw.snd.pcm0.maxautovchans looks promising as well, but seems to only
have the intended effect on -CURRENT. 

Unfortunately this feature seems to not be well documented.  Only a
brief mention at the bottom of the handbook page on sound cards (below
the troubleshooting section) added last July. 

Craig



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