[ALSA - lib 0000881]: Distorted sound with enabled dmix plugin

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=881> 
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Reported By:                yure
Assigned To:                
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Project:                    ALSA - lib
Issue ID:                   881
Category:                   pcm - digital audio
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             02-03-2005 12:25 CET
Last Modified:              02-04-2005 15:36 CET
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Summary:                    Distorted sound with enabled dmix plugin
Description: 
After 10-20 minutes listening music with xmms or beep-media-player I hear
distorted sound. Appear noise.
This problem is appear when enabled dmix plugin through configuration file
~/.asoundrc.
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----------------------------------------------------------------------
 yure - 02-04-05 15:30 
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Yes. I use pathced xmms.bmp with multi-threading.
Here fragment from my .asoundrc:
pcm.swmix {
        type dmix
        # any unique number here
        ipc_key 31334567
        slave {
                pcm "hw:0,0"
                # these settings may require tweaking for different sound
                # cards; this is for the Powerbook's built-in
snd-powermac
                # probably not required at all for well-behaved cards...
                period_time 0
                period_size 1024
                buffer_size 8192
                # mentioning rate fixes wrong speed/pitch in native ALSA
stuff
                rate 44100
        }

    # bindings are cool. This says, that only the first
    # two channels are to be used by swmix, which is enough for
    # (most) oss apps and also lets multichannel chios work
    # much faster:
    bindings {
        0 0   # from 0 => to 0
        1 1   # from 1 => to 1
    }
}

----------------------------------------------------------------------
 yure - 02-04-05 15:36 
----------------------------------------------------------------------
This problem also become apparented with previous version alsa lib on
another system:
Card: Intel 82801DB-ICH4
Chip: Realtek ALC650F

But with version 1.0.8 I can't reproduce this bug on this system.

lspci for this card
00:00.0 Host bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE DRAM
Controller/Host-Hub Interface (rev 03)
00:01.0 PCI bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP
Bridge (rev 03)
00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1
(rev 02)
00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2
(rev 02)
00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3
(rev 02)
00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI
Controller (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 82)
00:1f.0 ISA bridge: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) LPC Bridge (rev
02)
00:1f.1 IDE interface: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) UltraATA-100
IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus
Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX/MX
400] (rev b2)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)

Issue History
Date Modified  Username       Field                    Change              
======================================================================
02-03-05 12:25 yure           New Issue                                    
02-04-05 10:39 yure           Note Added: 0003497                          
02-04-05 10:39 yure           Issue Monitored: yure                        
02-04-05 14:53 tiwai          Note Added: 0003506                          
02-04-05 15:30 yure           Note Added: 0003508                          
02-04-05 15:36 yure           Note Added: 0003509                          
======================================================================




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