[USB-Audio - USB Device 0x46d:0x825, recording] Underruns, dropouts or crackling sound

Bug #875873 reported by Maksim Romanov on 2011-10-16
This bug affects 1 person
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)

Bug Description

After upgrating to 11.10 microphone is "bla-bla-bla"

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: i386
 /dev/snd/controlC1: romanof 1896 F.... pulseaudio
 /dev/snd/controlC0: romanof 1896 F.... pulseaudio
 Card hw:0 'SB'/'HDA ATI SB at 0xfebf8000 irq 16'
   Mixer name : 'Realtek ALC882'
   Components : 'HDA:10ec0882,1462040d,00100101 HDA:11c13026,11c13026,00100700'
   Controls : 35
   Simple ctrls : 21
 Card hw:1 'U0x46d0x825'/'USB Device 0x46d:0x825 at usb-0000:00:13.2-3, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0825'
   Controls : 2
   Simple ctrls : 1
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 6144
   Mono: Capture 6144 [100%] [30.00dB] [on]
Date: Sun Oct 16 20:44:37 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:U0x46d0x825 failed
Symptom_Card: Webcam C270 - USB Device 0x46d:0x825
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [USB-Audio - USB Device 0x46d:0x825, recording] Underruns, dropouts or crackling sound
UpgradeStatus: Upgraded to oneiric on 2011-10-13 (3 days ago)
dmi.bios.date: 09/04/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A1049AMS V3.01
dmi.board.name: MS-1049
dmi.board.vendor: MICRO-STAR INT'L CO.,LTD.
dmi.board.version: 0491
dmi.chassis.asset.tag: No Assert Tag
dmi.chassis.type: 9
dmi.chassis.vendor: MICRO-STAR INT'L CO.,LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA1049AMSV3.01:bd09/04/2006:svnMICRO-STARINT'LCO.,LTD.:pnMS-1049:pvr0491:rvnMICRO-STARINT'LCO.,LTD.:rnMS-1049:rvr0491:cvnMICRO-STARINT'LCO.,LTD.:ct9:cvrN/A:
dmi.product.name: MS-1049
dmi.product.version: 0491
dmi.sys.vendor: MICRO-STAR INT'L CO.,LTD.

It looks like recorded sound speed up - skype test service - repeat everything very quickly

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