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[Raymond <902997@xxxxxxxxxxxxxxxxxx>]

Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [on]
  Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Speaker',1
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [off]
  Front Right: Playback 64 [100%] [0.00dB] [off]


do you mean pulseaudio cannot use speaker with index 1

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https://bugs.launchpad.net/bugs/902997

Title:
  MacBook only uses 2 of 4 speakers

Status in “pulseaudio” package in Ubuntu:
  Confirmed

Bug description:
  The sound on my MacBook (2.1) is not as good in Ubuntu as in Mac OS.
  I think this is because PulseAudio uses only 2 speakers. (I guess the MacBook has 2 speakers and 2 subwoofers.)
  In the volume prefs, it does show 4 sliders but only 2 of them seem to do something.
  The profile is "Surround analogique 4.0 Output" (Analogic surround 4.0 Output).

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: pulseaudio 1:1.0-0ubuntu3.1
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pierre     9988 F.... pulseaudio
   /dev/snd/pcmC0D0p:   pierre     9988 F...m pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0x50440000 irq 43'
     Mixer name	: 'SigmaTel STAC9221 A1'
     Components	: 'HDA:83847680,106b2200,00103401'
     Controls      : 21
     Simple ctrls  : 13
  Date: Mon Dec 12 01:21:29 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: pulseaudio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/27/07
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MB21.88Z.00A5.B07.0706270922
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Mac-F4208CAA
  dmi.board.vendor: Apple Inc.
  dmi.board.version: PVT
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F4208CAA
  dmi.modalias: dmi:bvnAppleInc.:bvrMB21.88Z.00A5.B07.0706270922:bd06/27/07:svnAppleInc.:pnMacBook2,1:pvr1.0:rvnAppleInc.:rnMac-F4208CAA:rvrPVT:cvnAppleInc.:ct10:cvrMac-F4208CAA:
  dmi.product.name: MacBook2,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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