Re: Playing Surround Sound with Alsa Drivers

[Takashi Iwai <tiwai@suse.de>]

At Thu, 02 Jan 2003 10:40:56 +0100,
Benny Sjostrand wrote:
> 
> >
> >
> >Actually the drive that I use to send sound to the rears speakers is
> >"h:0,1" not "h:1,0". That's because the rear speakers controller is just
> >a subdevice of my first and only sound card. That works with no problems
> >sending sound only to the rear speakers but not to the four speakers.
> >I'm looking for a way to create surround sound using the four speakers.
> >There must be a way. Help please!
> >
> >  
> >
> Oops! sorry for my misstake, I mean hw:0,0 -> front speakers and 
> hw:0,1-> rear speakers (assuming that you got only one soundcard 
> installed). In such way it's possible to control each speaker 
> independently, programs like xine can take advantage of this.
> 
> Then, whatever you want to do is just a software issue. It's not 
> possible to send the same output to front and rear just via a simple 
> "aplay ...", maybe it's possible to do magic via the .asoundrc stuff 
> crearting a virtual device, but I dont know how to do that.

the latest alsa-lib cvs tree already includes the definition for
cs46xx.  you'll be able to play a 4-channel wav file like

	% aplay -Dsurround40 4channels.wav


Takashi


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