Re: ALC655 in CVS: Are Center/LFE switched with Surround?

[Takashi Iwai <tiwai@suse.de>]

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At Wed, 19 Nov 2003 23:04:57 +0800,
Richard Chan wrote:
> 
> 
> I've finally got 5.1 out of my via82xx/ALC655 system using the 
> Line-In/Mic jacks!
> Thanks Takashi.

glad to hear that it works now.  what was the problem?

 
> However I seem to have got Center/LFE switched with Surround.
> I.e. if I play xine & mplayer (L, R, RearL, RearR, Center, LFE)
> through surround51 I get Center/LFE switched with Rear speakers.

ah, this reminds me an old story.
there is a mixer switch "Swap Surround Slot".  and, IIRC, starngely
enough, for 5.1 this should be turned on for 5.1 output while it's off
for 4.0.

> 
> I must use the following to work in .asoundrc
> pcm_slave.sltest {
>     pcm "hw:0,1"
>     channels 6
> }
> 
> pcm.via51 {
>     type plug
>     ttable.0.0  1
>     ttable.1.1  1
>     ttable.2.4  1
>     ttable.3.5  1
>     ttable.4.2  1
>     ttable.5.3  1
>     slave sltest
> }

this is also a solution, but the attached would be more "light" way.
copy the attached file to /usr/share/alsa/cards.
also, if you have chance, please test 4.0 output, too.


thanks,

Takashi

[-- Attachment #2: VIA8233.conf --]
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#
# Configuration for the VIA8233/VIA8233C/VIA8235 chip with 4/6 multi-channel support
#

<confdir:pcm/front.conf>

VIA8233.pcm.front.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hw
	card $CARD
	device 0
}	

<confdir:pcm/surround40.conf>

VIA8233.pcm.surround40.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 1
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "Swap Surround Slot"
				device 0
				lock true
				preserve true
				value flase
				optional true
			}
		]
	}
}

<confdir:pcm/surround41.conf>
<confdir:pcm/surround50.conf>
<confdir:pcm/surround51.conf>

VIA8233.pcm.surround51.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 1
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "Swap Surround Slot"
				device 0
				lock true
				preserve true
				value true
				optional true
			}
		]
	}
}

<confdir:pcm/iec958.conf>

VIA8233.pcm.iec958.0 {
	@args [ CARD AES0 AES1 AES2 AES3 ]
	@args.CARD {
		type string
	}
	@args.DEV {
		type integer
	}
	@args.AES0 {
		type integer
	}
	@args.AES1 {
		type integer
	}
	@args.AES2 {
		type integer
	}
	@args.AES3 {
		type integer
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 0
		subdevice 3
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "IEC958 Playback AC97-SPSA"
				lock true
				preserve true
				value 3
			}
			{
				name "IEC958 Playback Default"
				lock true
				preserve true
				value [ $AES0 $AES1 $AES2 $AES3 ]
			}
			{
				name "IEC958 Playback Switch"
				lock true
				preserve true
				value true
			}
			{
				name "IEC958 Output Switch"
				lock true
				preserve true
				value true
			}
		]
	}
}

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