Volume controls

Michael 'Mickey' Lauer mickey at openmoko.org
Sun Nov 23 20:19:42 CET 2008

Am Sunday 23 November 2008 18:51:28 schrieb Dieter Spaar:
> Michael 'Mickey' Lauer wrote:
> > Am Saturday 22 November 2008 21:37:22 schrieb Al Johnson:
> >> On Saturday 22 November 2008, Joerg Reisenweber wrote:
> >>> I wonder whether these "defaults" always apply, or maybe we see
> >>> arbitrary/sticky settings for these, which would explain the constantly
> >>> changing suggestions for best alsa.state settings, to cope with
> >>> inadvertently changing sensitivity/level of calypso.
> >>>
> >>> We will have a look at this for moko11-fw, to have decent setup of
> >>> calypso by default.
> >>
> >> Can we also have a way to check the echo suppression status please?
> >
> > I agree, a query command for that would be helpful.
> > Dieter?
> OK, I will see what can be done and add it to the todo-list for "moko11".


> BTW, anyone already checked if the echo cancellation command ("AT%Nxx")
> really does something useful ?

Oh they do. The change is audible. It's still no clear which of the settings 
provide the best compromise though. I have studied said part of the code, but 
I'm wondering whether you can toggle echo cancellation and noise reduction 
completely independent or whether one category of these commands always turn 
off the other category and whether N0187 is the only one that toggles both 
ON, e.g. it's unclear whether you can set both to ON but with varying 
reduction (-6,-12,-18). What do you think?


More information about the devel mailing list