[ALSA - driver 0000653]: poor microphone recording quality on pcicmi

[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=653> 
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Reported By:                pbienst
Assigned To:                tiwai
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Project:                    ALSA - driver
Issue ID:                   653
Category:                   PCI - cmipci
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Distribution:               Gentoo
Kernel Version:             2.6.9-gentoo-r4
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Date Submitted:             11-18-2004 10:58 CET
Last Modified:              11-18-2004 18:07 CET
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Summary:                    poor microphone recording quality on pcicmi
Description: 
I have a C-Media PCI CMI8738-MC6 (rev 16) from a Hercules Muse DVD soundd
card.

When recording from a headset microphone, sound quality is really bad: low

volume and quite some noise / distortion.

I have my microphone mixers maxed out, 'Mic boost' is on, 'Mic as
Center/LFE' 
is off.

I've fiddled with all the other options, but they don't seem to affect the

quality.

I do my recording with:

arecord -D hw:1,0 -d 4 test.wav

Under Windows, sound quality is a lot better with the same setup.
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----------------------------------------------------------------------
 tiwai - 11-18-04 18:07 
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Could you try the attached patch and play with "MICBST", "EMUCB"
and "VADMIC3" mixer switches?

(AFAIK, "Mic Boost" affects only the mic playback volume.)

Issue History
Date Modified  Username       Field                    Change              
======================================================================
11-18-04 10:58 pbienst        New Issue                                    
11-18-04 10:58 pbienst        Distribution              => Gentoo          
11-18-04 10:58 pbienst        Kernel Version            => 2.6.9-gentoo-r4 
11-18-04 18:07 tiwai          Note Added: 0002453                          
======================================================================




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