[ALSA - driver 0000617]: Front / rear out of sync

[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=617> 
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Reported By:                henkie_
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   617
Category:                   PCI - cs46xx
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Distribution:               SuSE 9.0
Kernel Version:             2.4.26
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Date Submitted:             10-30-2004 18:20 CEST
Last Modified:              11-10-2004 22:37 CET
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Summary:                    Front / rear out of sync
Description: 
When using the config specified below the sound gets out of sync (front and
rear sound) in xmms. The higher cpu-usage is the faster the sound goes
out-of-sync. When using mplayer in combo with this config, cpu usage goes
up, and the image of the movie halts but sound keeps playing. Without this
config the cpu-usage is around 20%. Tested on P4 2.8GHz.  
In alsa <1.0  the front and rear sound was duplicated, is it possible to
reimplement that behaviour again?

pcm.ch40dup {
        type route
        slave.pcm surround40
        slave.channels 4
        ttable.0.0 1
        ttable.1.1 1
        ttable.0.2 1
        ttable.1.3 1
}
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----------------------------------------------------------------------
 tiwai - 11-10-04 12:43 
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Well, I don't remember that the signal duplication was implemented on this
chip.
Which version was that?  Was it automatically enabled when you play a
normal PCM?

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 henkie_ - 11-10-04 22:37 
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I have this chipset according to "lspci"
Multimedia audio controller: Cirrus Logic CS 4614/22/24 [CrystalClear
SoundFusion Audio Accelerator] (rev 01)
And i am pretty sure 0.90rc3 (not the only one though) duplicated the
sound, so front and rear were exactly the same. In the windows-driver
(atleast 3 years back, havent checked lately) this was also an option. 
And yes, it was automatically enabled.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
10-30-04 18:20 henkie_        New Issue                                    
10-30-04 18:20 henkie_        Distribution              => SuSE 9.0        
10-30-04 18:20 henkie_        Kernel Version            => 2.4.26          
11-10-04 12:43 tiwai          Note Added: 0002368                          
11-10-04 22:37 henkie_        Note Added: 0002379                          
======================================================================




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