[alsa-devel] poor sound from ALC 850/880 in alsa 1.0.21 and 1.0.23

Colin Kincaid Williams discord at uw.edu
Sat Nov 27 19:58:27 CET 2010


no, the motherboard has 6 plugs, but no digital outputs on the back.
Furthermore, I muted the CD channel, the line in was already muted,
but I still have crap sound compared to my $20 mp3 player. Something
else is wrong!

On Fri, Nov 26, 2010 at 11:48 PM, Raymond Yau
<superquad.vortex2 at gmail.com> wrote:
> 2010/11/27 Colin Kincaid Williams <discord at uw.edu>
>
>> On Fri, Nov 26, 2010 at 8:35 PM, Daniel Chen <seven.steps at gmail.com>
>> wrote:
>> > Please use http://www.alsa-project.org/alsa-info.sh
>> >
>>
>
>
>
> Node 0x17 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x00 0x00]
>  Pincap 0x0000003f: IN OUT HP Detect Trigger ImpSense
>  Pin Default 0x01012014: [Jack] Line Out at Ext Rear
>    Conn = 1/8, Color = Grey
>    DefAssociation = 0x1, Sequence = 0x4
>  Pin-ctls: 0x40: OUT
>  Unsolicited: tag=00, enabled=0
>  Connection: 1
>     0x0f
>
> if your motherboard have 6 audio jacks (pink, blue , green , black , orange
> and grey ) and digital output at rear panel, you should try model=6stack-dig
>
> Simple mixer control 'CD',0
>  Capabilities: pvolume pswitch penum
>  Playback channels: Front Left - Front Right
>  Limits: Playback 0 - 65
>  Mono:
>  Front Left: Playback 0 [0%] [-35.00dB] [on]
>  Front Right: Playback 0 [0%] [-35.00dB] [on]
>
> Make sure that you have muted those playback volume control of "CD"
> ,"Line" to reduce noise from those input to your output
>
>
>
>>> Simple mixer control 'Channel Mode',0
>>>  Capabilities: enum
>>>  Items: '8ch'
>>>  Item0: '8ch'
>>>
>
>
> only those motherboard with less than 4 output jacks need the "channel mode"
> control to retask some input jacks as output jacks
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