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

[Raymond Yau]

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