Public bug reported:
I discovered the problem by listening a linear chirp on wikipedia,
http://en.wikipedia.org/wiki/File:Linchirp.ogg. At about 1 sec, a second
chirp can be heard. On the bad quality recording attached, it's hearable
from 1.5 sec. I recorded it with Audacity playing the chirp sound in the
same time. The playing device of ALSA in Audacity is set on "default".
When I change it for "dmix", the problem disappears. I observed the same
in VLC, when I change the output device for ALSA from "predefined"
(problem) to "HDA Intel: ALC269 Analog (hw:0,0)". I suspect a problem of
sampling rate, for example between 44100 and 48000 Hz, in alsa
configuration.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: alsa-base 1.0.22.1+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfcbf4000 irq 22'
Mixer name : 'Realtek ALC269'
Components : 'HDA:10ec0269,10431483,00100004'
Controls : 14
Simple ctrls : 9
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xfe97c000 irq 16'
Mixer name : 'Nvidia ID b'
Components : 'HDA:10de000b,10de0101,00100100'
Controls : 0
Simple ctrls : 0
Card1.Amixer.values:
Date: Sun Apr 11 01:30:34 2010
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=fr_FR:fr:en_GB:en
PATH=(custom, user)
LANG=fr_FR.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
dmi.bios.date: 11/24/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 208
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UL80VT
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr208:bd11/24/2009:svnASUSTeKComputerInc.:pnUL80VT:pvr1.0:rvnASUSTeKComputerInc.:rnUL80VT:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: UL80VT
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
--
problem of sampling rate with "default" output
https://bugs.launchpad.net/bugs/560492
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