[alsa-devel] [Alsa-user] Metallic recording in cs46xx on Thinkpad T22

[Takashi Iwai]

At Thu, 13 Mar 2008 14:11:30 +0200,
Gadi Oron wrote:
> 
> Hopefully it is full now.

Well, the content is now full but I mean to adjust "ADC Volume" to the
full value, 32767... :)


thanks,

Takashi

> 
> http://pastebin.ca/940929
> 
> On Thu, Mar 13, 2008 at 12:48 PM, Takashi Iwai <tiwai at suse.de> wrote:
> 
>     At Wed, 12 Mar 2008 18:17:43 +0100,
>     Rene Herman wrote:
>     >
>     > On 12-03-08 17:59, Takashi Iwai wrote:
>     >
>     > > At Wed, 12 Mar 2008 17:39:48 +0100,
>     > > Rene Herman wrote:
>     > >> On 12-03-08 15:43, Takashi Iwai wrote:
>     > >>
>     > >>> At Tue, 11 Mar 2008 23:01:39 +0100,
>     > >>> Rene Herman wrote:
>     > >>>> On 11-03-08 08:24, Gadi Oron wrote:
>     > >>>>
>     > >>>>> I am trying to record sound on an old Thinkpad T22 that uses the
>     cs46xx
>     > >>>>> sound driver.
>     > >>>>>
>     > >>>>> Each time you start to record you have a 10% chance of having the
>     > >>>>> recording completely distorted and having a metallic sound. When
>     you
>     > >>>>> look at the waveform it looks as though there are small segments
>     with
>     > >>>>> sharp transitions between them, a little like if these segments
>     were
>     > >>>>> moved a little from their correct place.
>     > >>>> No insights, but I confirm the bug with a TerraTec DMX XFire 1024
>     (CS4624).
>     > >>> Hm, cs46xx driver hasn't been much changes since long time ago
>     (around
>     > >>> year 2005).  The only big change was about some PM fixes, and I don't
>     > >>> think it's relevant...  Could you run als-info.sh to get the status?
>     > >> At:
>     > >>
>     > >> http://pastebin.ca/939784
>     > >
>     > > The output seems truncated.  Could you give the generated file via
>     > > "alsactl -f somefile store", just to be sure ?
>     >
>     > Hmm, alsa-info.sh freshly downloaded from current hg.
>    
>     Is the original data also truncated at the middle or is it a paste.bin
>     problem?
>    
>     >       control.26 {
>     >               comment.access 'read write'
>     >               comment.type INTEGER
>     >               comment.count 2
>     >               comment.range '0 - 32767'
>     >               iface MIXER
>     >               name 'ADC Volume'
>     >               value.0 29492
>     >               value.1 29492
>     >       }
>    
>     Try to put this to full once.
> 
>     Takashi
> 
>