http://ubuntuforums.org/showpost.php?p=9385594&postcount=4
may be device 1 is also used for spdif on you x-fi pro,
so you need to define the device of iec958 and you have to send email to
alsa-de...@alsa-project.org about the name "Pro" or "SB X-Fi" or " SB X-Fi
Surround 5.1 Pro"
card 1: Pro [SB X-Fi Surround 5.1 Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
!-------Mixer controls for card 1 [Pro]
Card hw:1 'Pro'/'Creative Technology Ltd SB X-Fi Surround 5.1 Pro at
usb-0000:0b:00.0-1, full sp'
Mixer name : 'USB Mixer'
Components : 'USB041e:30df'
Controls : 1
Simple ctrls : 1
Simple mixer control 'Power LED',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
# If a device does not use the first PCM device for digital data, the device
# number for the iec958 device can be changed here.
USB-Audio.pcm.iec958_device {
# "NoiseBlaster 3000" 42
+ "SB X-Fi" 1
+ "Pro" 1
# The below don't have digital in/out, so prevent them from being
opened.
"Blue Snowball" 999
"Logitech Speaker Lapdesk N700" 999
"Logitech USB Headset" 999
"Logitech Wireless Headset" 999
"Plantronics GameCom 780" 999
"Plantronics USB Headset" 999
"Plantronics Wireless Audio" 999
"SB WoW Headset" 999
"Sennheiser USB headset" 999
"USB Device 0x46d:0x992" 999
}
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1051665
Title:
[USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts
or crackling sound
Status in “alsa-driver” package in Ubuntu:
Confirmed
Bug description:
The sound is constantly crackling when I'm listening to the music. If
I listen to last.fm or youtube for instance in my Chromium browser the
sound is really good. If I try to use Rhythmbox or Banshee first
couple of songs may be heard fine but then crackling comes. Especially
crackling starts if I launch Skype. Even if later I turn Skype off
still the sound remains bad.
I failed to try to redirect the sound directly to ALSA device
bypassing PulseAudio server (I didn't find audio settings neither in
Rhythmbox nor Banshee) so I cannot tell whether the problem depends on
the server or it lays somewhere below in ALSA subsystem.
Also I tried to play with default-fragments and default-fragment-size-msec
values in /etc/pulse/daemon.conf but it didn't help. Then having read
https://wiki.ubuntu.com/DebuggingSoundProblems page I added tsched=0 argument
to
load-module module-udev-detect line in /etc/pulse/default.pa. The result was
not successful.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
Uname: Linux 3.2.0-30-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf7b00000 irq 58'
Mixer name : 'IDT 92HD87B1/3'
Components : 'HDA:111d76d1,102804b0,00100205'
Controls : 16
Simple ctrls : 9
Card1.Amixer.info:
Card hw:1 'Pro'/'Creative Technology Ltd SB X-Fi Surround 5.1 Pro at
usb-0000:0b:00.0-1, full sp'
Mixer name : 'USB Mixer'
Components : 'USB041e:30df'
Controls : 1
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Power LED',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Card2.Amixer.info:
Card hw:2 'NVidia'/'HDA NVidia at 0xf6080000 irq 17'
Mixer name : 'Nvidia GPU 14 HDMI/DP'
Components : 'HDA:10de0014,10de0101,00100100'
Controls : 24
Simple ctrls : 4
Date: Sun Sep 16 22:46:15 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/usr/bin/tcsh
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Pro successful
Symptom_Card: GF108 High Definition Audio Controller - HDA NVidia
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts
or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/22/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0HVRTT
dmi.board.vendor: Dell Inc.
dmi.board.version: A10
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA10:bd03/22/2012:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn0HVRTT:rvrA10:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron N5110
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
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