Re: Channel modes feature request.

[Takashi Iwai <tiwai@suse.de>]

At Tue, 12 Aug 2003 00:19:34 +0100,
James Courtier-Dutton wrote:
> 
> I have a SB live audio card.
> I can open it with device names like: -
> surround40 (Front Left, Front Right, Rear Left, Rear Right)
> surround51 (Front Left, Front Right, Rear Left, Rear Right, Center, LFE)
> 
> There is a requirement for: -
> surround41 (Front Left, Front Right, Rear Left, Rear Right, LFE)
> surround50 (Front Left, Front Right, Rear Left, Rear Right, Center)
> 
> How can I get alsa to support these ?

i still don't understand your question quite correctly.

do you mean open a multi-channel (5ch) pcm stream wihh the
configuration above?
if so, it's not too difficult for sb live (but not always easy for
other cards).  it would look like:

pcm.my5ch {
	type multi

	slaves.a.pcm "front"
	slaves.a.channels 2
	slaves.b.pcm "rear"
	slaves.b.channels 2
	slaves.c.pcm "lfe"
	slaves.c.channels 1

	bindings.0.slave a
	bindings.0.channel 0
	bindings.1.slave a
	bindings.1.channel 1
	bindings.2.slave b
	bindings.2.channel 0
	bindings.3.slave b
	bindings.3.channel 1
	bindings.4.slave c
	bindings.4.channel 0
}


Takashi


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