* [ALSA - driver 0002006]: High frequency noise in output from SI7012 (intel8x0)
@ 2006-04-17 18:18 bugtrack
0 siblings, 0 replies; 2+ messages in thread
From: bugtrack @ 2006-04-17 18:18 UTC (permalink / raw)
To: alsa-devel
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2006>
======================================================================
Reported By: jaime
Assigned To:
======================================================================
Project: ALSA - driver
Issue ID: 2006
Category: PCI - intel8x0
Reproducibility: always
Severity: major
Priority: normal
Status: new
Distribution: Slax 5.1.0, Debian Etch, Ubuntu Dapper
Kernel Version: 2.6.16 / 2.6.15
======================================================================
Date Submitted: 04-06-2006 04:27 CEST
Last Modified: 04-17-2006 20:18 CEST
======================================================================
Summary: High frequency noise in output from SI7012
(intel8x0)
Description:
Sound chip is SI7012 built into Asrock K7S8X. To demonstrate the noise,
I've played "orig.wav" throught the SI7012 and recorded the (analog)
output on
another computer. When I boot the PC into Windows 2000, the output is
clean: the recording is "win2k.wav". Then I reboot into Linux and use
"aplay -Dhw:0,0 orig.wav" and record the output again: the recording is
"alsa.wav". Ignoring the clicks in the last half of "win2k.wav" (the
click are the hard-drive reads), I can hear a high frequency intermittent
"buzz" in the last half of "alsa.wav" that isn't present in "win2k.wav".
To hear this, I think you will need headphones, but the buzzing is
definitely there.
As the three wave files are too big to attach, I've put them on the web
here:
orig.wav: http://www.carbon.eclipse.co.uk/orig.wav
win2k.wav: http://www.carbon.eclipse.co.uk/win2k.wav
alsa.wav: http://www.carbon.eclipse.co.uk/alsa.wav
The version used is 1.0.11rc2, but the same problem occurs in the older
1.0.10.
======================================================================
----------------------------------------------------------------------
jaime - 04-17-06 20:18
----------------------------------------------------------------------
FWIW, I've just tried the same thing on an up-to-date Gentoo ~x86
("testing" or "unstable") and the problem is still there. This is using
vanilla-sources 2.6.17-rc1 which contains alsa 1.0.11rc4 (Wed Mar 22
10:27:24 2006 UTC)
Hope this helps.
Issue History
Date Modified Username Field Change
======================================================================
04-06-06 04:27 jaime New Issue
04-06-06 04:27 jaime Distribution => Slax 5.1.0, Debian
Etch, Ubuntu Dapper
04-06-06 04:27 jaime Kernel Version => 2.6.16 / 2.6.15
04-14-06 03:29 Ensnared Issue Monitored: Ensnared
04-17-06 20:18 jaime Note Added: 0009320
======================================================================
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^ permalink raw reply [flat|nested] 2+ messages in thread* [ALSA - driver 0002006]: High frequency noise in output from SI7012 (intel8x0)
@ 2006-04-06 2:27 bugtrack
0 siblings, 0 replies; 2+ messages in thread
From: bugtrack @ 2006-04-06 2:27 UTC (permalink / raw)
To: alsa-devel
The following issue has been SUBMITTED.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2006>
======================================================================
Reported By: jaime
Assigned To:
======================================================================
Project: ALSA - driver
Issue ID: 2006
Category: PCI - intel8x0
Reproducibility: always
Severity: major
Priority: normal
Status: new
Distribution: Slax 5.1.0, Debian Etch, Ubuntu Dapper
Kernel Version: 2.6.16 / 2.6.15
======================================================================
Date Submitted: 04-06-2006 04:27 CEST
Last Modified: 04-06-2006 04:27 CEST
======================================================================
Summary: High frequency noise in output from SI7012
(intel8x0)
Description:
Sound chip is SI7012 built into Asrock K7S8X. To demonstrate the noise,
I've played "orig.wav" throught the SI7012 and recorded the (analog)
output on
another computer. When I boot the PC into Windows 2000, the output is
clean: the recording is "win2k.wav". Then I reboot into Linux and use
"aplay -Dhw:0,0 orig.wav" and record the output again: the recording is
"alsa.wav". Ignoring the clicks in the last half of "win2k.wav" (the
click are the hard-drive reads), I can hear a high frequency intermittent
"buzz" in the last half of "alsa.wav" that isn't present in "win2k.wav".
To hear this, I think you will need headphones, but the buzzing is
definitely there.
As the three wave files are too big to attach, I've put them on the web
here:
orig.wav: http://www.carbon.eclipse.co.uk/orig.wav
win2k.wav: http://www.carbon.eclipse.co.uk/win2k.wav
alsa.wav: http://www.carbon.eclipse.co.uk/alsa.wav
The version used is 1.0.11rc2, but the same problem occurs in the older
1.0.10.
======================================================================
Issue History
Date Modified Username Field Change
======================================================================
04-06-06 04:27 jaime New Issue
04-06-06 04:27 jaime Distribution => Slax 5.1.0, Debian
Etch, Ubuntu Dapper
04-06-06 04:27 jaime Kernel Version => 2.6.16 / 2.6.15
======================================================================
-------------------------------------------------------
This SF.Net email is sponsored by xPML, a groundbreaking scripting language
that extends applications into web and mobile media. Attend the live webcast
and join the prime developer group breaking into this new coding territory!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
^ permalink raw reply [flat|nested] 2+ messages in thread
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