Bad audio quality on freerunner

[Ole Kliemann]

On Thu, Jul 10, 2008 at 01:49:14AM +0200, Joerg Reisenweber wrote:
> Am Mi  9. Juli 2008 schrieb Ole Kliemann:
> > Hi,
> > 
> > with the daily qtopia-20080709 I have bad voice quality during calls. 
> > 
> > I have some active speakers in my room. Everytime you go near them with
> > a handy during a call, you can hear an artificial buzzing noise in them.
> > I am sure you know what phenomenon I mean.
> > 
> > Exactly this kind of noise I hear in the freerunner and the callee hears
> > it in his handset.
> > 
> > I also tried daily gtk-20080708 and the gtk-20080424. With both I have
> > some artificials and not so good quality overall but it's tolerable. The
> > callee on the other hand has the same buzzing noise mentioned above.
> > 
> > Is there a software version out already that has acceptable audio
> > quality?
> > 
> > Best regards,
> > Ole
> > 
> 
> Local sound may be fixed by alsamixer setup resp choosing right 
> version/editing of handset.state file in /usr/share/openmoko/scenarios.
> Far end noise seems somewhat dependent on FR's local GSM service provider and 
> actual basestation, more than on alsamixer settings. We are still 
> investigating this.
> The issue doesn't seem to depend on sw-image largely.
> 
> cheers
> jOERG

If you care for more information: using this sw-image [1] I have only
some artifects on the FR and a continous buzzing noise on the far end.
If I switch on the FR to keypad view during the call and send DTMF
tones, the buzzing on the far end stops for the duration of the DTMF
tone. But the quality of the transmitted DTMF does not sound very good.

The buzzing can sometimes be stopped by quickly shaking the FR but comes
back as soon as I speak something.

[1] http://buildhost.openmoko.org/daily/freerunner/200807/20080710/Openmoko-openmoko-devel-image-glibc-ipk-P1-Snapshot-20080710-om-gta02.rootfs.jffs2
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