Getting rid of echo for callers.
zuber at puzzle.ch
Fri Aug 29 10:05:24 CEST 2008
Am Freitag, 29. August 2008 07.13:41 schrieb Dale Maggee:
> Daniel Selinger wrote:
> > I've experimented with alsa settings for the last 3 hours and want to
> > share my experience now.
> > I was doing this on top of QTopia 4.3.2 and it's default
> > gsmhandset.state file.
> > The relevant mixer settings i found to, in my case completely eliminate
> > the echo for the caller, are the following
> > (Setting -> Old Val -> New Val):
> > 'Speaker Playback Volume' 127 -> 100
> > 'Mono Playback Volume' 103 -> 85
> > 'Mono Sidetone Playback Volume' 2 -> 0
> > 'Bypass Playback Volume' 7 -> 5
> > 'Mic2 Capture Volume' 0 -> 3
> > This settings removes the echo for the other person completely, at
> > least for my hardware. I didn't hear any buzz either on my final
> > testcalls, could be luck.
> > The last thing remaining, is a bit of selfecho, which was also
> > reduced with this settings but not away. (was as loud as the echo on the
> > other phone with qtopia default gsmhandset.state). But didn't get away
> > completely, but the other side doesn't hear anything of it.
> > I also attach my gsmhandset.state for the case other distros have a
> > different default file. (I was to lazy to check against .state of every
> > distribution)
> > If anyone has a configuration where he doesn't hear echo of himself
> > talking at all, please please please provide me with an .state file, to
> > check which controls are responsible for that!
> > rgds Daniel
> > ------------------------------------------------------------------------
> These settings also removed my echo using 2007.2.
> Note that using the settings you provided the other (non-neo) person was
> very quiet, I had to adjust one of the volume settings to be able to
> hear the other person (unfortunately I can't remember exactly which
> setting I changed, although I'm pretty sure it was the one labelled
> "mono bypass" in alsamixer. (set it at 100). Called my brother who had
> previously complained loudly and constantly about echo, and now he says
> there's no echo.
> I have never had problems of hearing an echo of myself, only complaints
> from everybody I talk to...
> this is awesome, thanks alot! :)
This is absolutly great, thx both of you!
I hope this gets fixed in the stable branch now. My tweak link list grows
To OpenMoko.. is there a way to help you with the distribution? I don't like
the idea of a personal repository for hotfixes like this, i think this should
go directly to the official repo's. May be we can use git in a clever way to
minimize the work you have with the integration of such changes.
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