sound from webcam's microphone is distorted (too high pitch, too fast)

Bug #883805 reported by Giorgos Akrivas on 2011-10-30
38
This bug affects 8 people
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)
Undecided
Unassigned

Bug Description

I use a logitech webcam that has a microphone ([USB-Audio - USB Device 0x46d:0x802, recording], the sound control reports it as webcam c200). When trying to record sounds using this microphone, the recorded sound sounds too high pitched and too fast, like a record that is spun too fast. The problem does not occur with the internal microphone, only with the webcam microphone. The problem is a new one that first occurred with oneiric, the webcam's microphone used to work up until natty.

The way to reproduce the problem is to use sound recorder and try to record something, then play it back. it will sound too fast and too high-pitched. Skype also cannot make a sound call.

What is interesting is that running ubuntu-bug audio asked me to record sound using this sound device: this time my voice sounded normal, neither fast nor high-pitched.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alsa-base 1.0.24+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6
Uname: Linux 3.0.0-13-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC660-VD Analog [ALC660-VD Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu4
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: giorgos 1973 F.... pulseaudio
 /dev/snd/pcmC1D0c: giorgos 1973 F...m pulseaudio
 /dev/snd/controlC0: giorgos 1973 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfeaf8000 irq 45'
   Mixer name : 'Realtek ALC660-VD'
   Components : 'HDA:10ec0660,1179ff40,00100001 HDA:11c11040,11790001,00100200'
   Controls : 14
   Simple ctrls : 9
Card1.Amixer.info:
 Card hw:1 'U0x46d0x802'/'USB Device 0x46d:0x802 at usb-0000:00:1d.7-3.4, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0802'
   Controls : 2
   Simple ctrls : 1
Card1.Amixer.values:
 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 30 13:21:35 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:U0x46d0x802 successful
Symptom_Card: Webcam C200 - USB Device 0x46d:0x802
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:U0x46d0x802 successful
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [USB-Audio - USB Device 0x46d:0x802, recording] Sound is distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/19/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.60
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: Satellite L40
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.60:bd09/19/2007:svnTOSHIBA:pnSatelliteL40:pvrPSL48E-01R01QGE:rvnTOSHIBA:rnSatelliteL40:rvr1.0:cvnTOSHIBA:ct10:cvr:
dmi.product.name: Satellite L40
dmi.product.version: PSL48E-01R01QGE
dmi.sys.vendor: TOSHIBA

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in alsa-driver (Ubuntu):
status: New → Confirmed
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