Debian Bug report logs - #736512
alsa-base: Creative Labs CA0106 Soundblaster captures broken audio, unless same program is using any alsa device for playback

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Package: alsa-base; Maintainer for alsa-base is Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>; Source for alsa-base is src:alsa-base.

Reported by: "Nikolay Shaplov \(Swami Dhyan Nataraj\)" <dhyan@nataraj.su>

Date: Fri, 24 Jan 2014 12:48:01 UTC

Severity: normal

Found in version alsa-base/1.0.25+3~deb7u1

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Report forwarded to debian-bugs-dist@lists.debian.org, Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>:
Bug#736512; Package alsa-base. (Fri, 24 Jan 2014 12:48:06 GMT) Full text and rfc822 format available.

Acknowledgement sent to "Nikolay Shaplov \(Swami Dhyan Nataraj\)" <dhyan@nataraj.su>:
New Bug report received and forwarded. Copy sent to Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>. (Fri, 24 Jan 2014 12:48:06 GMT) Full text and rfc822 format available.

Message #5 received at submit@bugs.debian.org (full text, mbox):

From: "Nikolay Shaplov \(Swami Dhyan Nataraj\)" <dhyan@nataraj.su>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: alsa-base: Creative Labs CA0106 Soundblaster captures broken audio, unless same program is using any alsa device for playback
Date: Fri, 24 Jan 2014 16:39:10 +0400
[Message part 1 (text/plain, inline)]
Package: alsa-base
Version: 1.0.25+3~deb7u1
Severity: normal

Dear Maintainer,

I have Creative Labs CA0106 Soundblaster (PCI: 1102:0007, snd-ca0106)

And it does not work properly on audio capture in a very strange way:

Ones I try to capture some sound it gives me a result broken in a way shown in attached file (there I slowly says "1 2 3 4 5")

But if I use audacity for capturing and there are other tracks that is played back while recording, sound captures well.

Play back can use the same device, or another, it does not matter, if playback is on, capture is good. So I consider it is not snd-ca0106 module problem, or not only the module problem.

If I start playback with another program (i.e. vlc) and start capturing with audacity without playback, then captured result is also broken.

So I consider that it works only when playback takes place in the same alsa session (or whatever it should be called)

Do you know anything abut such issues? I can provide more info or do other exploration if you tell me where to explore.


-- Package-specific info:
--- Begin additional package status ---
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                                       Version                    Architecture               Description
+++-==========================================-==========================-==========================-=========================================================================================
ii  libasound2:i386                            1.0.25-4                   i386                       shared library for ALSA applications
--- End additional package status ---
--- Begin /proc/asound/version ---
Advanced Linux Sound Architecture Driver Version 1.0.24.
--- End /proc/asound/version ---
--- Begin /proc/asound/cards ---
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7f10000 irq 44
 1 [CA0106         ]: CA0106 - CA0106
                      Audigy SE [SB0570] at 0xd000 irq 17
--- End /proc/asound/cards ---
--- Begin /dev/snd/ listing ---
total 0
drwxr-xr-x  2 root root       80 Jan 24 15:23 by-path
crw-rw---T+ 1 root audio 116, 21 Jan 24 15:23 controlC0
crw-rw---T+ 1 root audio 116, 11 Jan 24 15:23 controlC1
crw-rw---T+ 1 root audio 116, 20 Jan 24 15:23 hwC0D2
crw-rw---T+ 1 root audio 116, 19 Jan 24 15:23 hwC0D3
crw-rw---T+ 1 root audio 116,  2 Jan 24 15:23 midiC1D0
crw-rw---T+ 1 root audio 116, 18 Jan 24 16:10 pcmC0D0c
crw-rw---T+ 1 root audio 116, 17 Jan 24 16:22 pcmC0D0p
crw-rw---T+ 1 root audio 116, 16 Jan 24 15:41 pcmC0D1p
crw-rw---T+ 1 root audio 116, 15 Jan 24 15:23 pcmC0D2p
crw-rw---T+ 1 root audio 116, 14 Jan 24 15:25 pcmC0D3p
crw-rw---T+ 1 root audio 116, 13 Jan 24 15:25 pcmC0D7p
crw-rw---T+ 1 root audio 116, 12 Jan 24 15:25 pcmC0D8p
crw-rw---T+ 1 root audio 116, 10 Jan 24 16:22 pcmC1D0c
crw-rw---T+ 1 root audio 116,  9 Jan 24 16:22 pcmC1D0p
crw-rw---T+ 1 root audio 116,  8 Jan 24 16:10 pcmC1D1c
crw-rw---T+ 1 root audio 116,  7 Jan 24 15:25 pcmC1D1p
crw-rw---T+ 1 root audio 116,  6 Jan 24 16:10 pcmC1D2c
crw-rw---T+ 1 root audio 116,  5 Jan 24 15:25 pcmC1D2p
crw-rw---T+ 1 root audio 116,  4 Jan 24 16:10 pcmC1D3c
crw-rw---T+ 1 root audio 116,  3 Jan 24 15:25 pcmC1D3p
crw-rw---T+ 1 root audio 116,  1 Jan 24 15:23 seq
crw-rw---T+ 1 root audio 116, 33 Jan 24 15:23 timer
--- End /dev/snd/ listing ---

-- System Information:
Debian Release: 7.1
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/4 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages alsa-base depends on:
ii  dpkg    1.16.10
ii  kmod    9-3
ii  procps  1:3.3.3-3
ii  udev    175-7.2

Versions of packages alsa-base recommends:
ii  alsa-utils  1.0.25-4

Versions of packages alsa-base suggests:
pn  alsa-oss    <none>
pn  oss-compat  <none>

Versions of packages libasound2 depends on:
ii  libc6              2.13-38
ii  multiarch-support  2.13-38

Versions of packages libasound2 suggests:
ii  libasound2-plugins  1.0.25-2

-- no debconf information
[one...five-brocken.ogg (application/ogg, attachment)]

Information forwarded to debian-bugs-dist@lists.debian.org, Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>:
Bug#736512; Package alsa-base. (Wed, 29 Jan 2014 10:00:04 GMT) Full text and rfc822 format available.

Acknowledgement sent to Elimar Riesebieter <riesebie@lxtec.de>:
Extra info received and forwarded to list. Copy sent to Debian ALSA Maintainers <pkg-alsa-devel@lists.alioth.debian.org>. (Wed, 29 Jan 2014 10:00:04 GMT) Full text and rfc822 format available.

Message #10 received at 736512@bugs.debian.org (full text, mbox):

From: Elimar Riesebieter <riesebie@lxtec.de>
To: "Nikolay Shaplov (Swami Dhyan Nataraj)" <dhyan@nataraj.su>, 736512@bugs.debian.org
Subject: Re: [Pkg-alsa-devel] Bug#736512: alsa-base: Creative Labs CA0106 Soundblaster captures broken audio, unless same program is using any alsa device for playback
Date: Wed, 29 Jan 2014 10:57:19 +0100
* Nikolay Shaplov (Swami Dhyan Nataraj) <dhyan@nataraj.su> [2014-01-24 16:39 +0400]:

> Package: alsa-base
> Version: 1.0.25+3~deb7u1
> Severity: normal
> 

> Dear Maintainer,
> 
> I have Creative Labs CA0106 Soundblaster (PCI: 1102:0007,
> snd-ca0106)
> And it does not work properly on audio capture in a very strange
> way:
> Ones I try to capture some sound it gives me a result broken in a
> way shown in attached file (there I slowly says "1 2 3 4 5")
> But if I use audacity for capturing and there are other tracks
> that is played back while recording, sound captures well.
> Play back can use the same device, or another, it does not matter,
> if playback is on, capture is good. So I consider it is not
> snd-ca0106 module problem, or not only the module problem.
> If I start playback with another program (i.e. vlc) and start
> capturing with audacity without playback, then captured result is
> also broken.
> So I consider that it works only when playback takes place in the
> same alsa session (or whatever it should be called)
> Do you know anything abut such issues? I can provide more info or
> do other exploration if you tell me where to explore.
> 
> -- Package-specific info:
> --- Begin additional package status ---
> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name                                       Version                    Architecture               Description
> +++-==========================================-==========================-==========================-=========================================================================================
> ii  libasound2:i386                            1.0.25-4                   i386                       shared library for ALSA applications
> --- End additional package status ---
> --- Begin /proc/asound/version ---
> Advanced Linux Sound Architecture Driver Version 1.0.24.
> --- End /proc/asound/version ---
> --- Begin /proc/asound/cards ---
>  0 [PCH            ]: HDA-Intel - HDA Intel PCH
>                       HDA Intel PCH at 0xf7f10000 irq 44
>  1 [CA0106         ]: CA0106 - CA0106
>                       Audigy SE [SB0570] at 0xd000 irq 17
> --- End /proc/asound/cards ---

Your default card is a HDA-Intel?

For your soundblaster I found a hint at [0]: 

"Not all features on all models supported. On the VX, white noise on playback
unless initialized in Windows first. One quirky (but permanent) workaround is
to enable the old oss modules, specifically the 100% sound blaster compatible
module (sb). You don't have to load the oss modules. The alsa module snd-ca0106
works fine somehow if the old sb module is compiled in the kernel as a module
(no white noise)."

You`re running stable. So your drivers are provided since ages and there is no
bug reported like yours, though. I don't have a CA0106 based soundcard handy,
so I can't reproduce..

[0] http://www.alsa-project.org/main/index.php/Matrix:Vendor-Creative_Labs

Elimar
-- 
  Do you smell something burning or ist it me?



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