Buzzing on GSM audio

rakshat hooja rakshat at
Sat Jul 26 16:58:59 CEST 2008

On Sat, Jul 26, 2008 at 8:22 PM, Andrew Bruno <aeb at> wrote:

> I've found using alsamixer helpful for testing and then comparing which
> values changed against the original gsmhandset.state file. My procedure
> usually goes something like this:
> 1. ssh to FreeRunner
> 2. Make a phone call
> 3. While call is in progress run alsamixer
> 4. Tweak settings to minimize buzzing/echo
> 5. While call is still in progress run:
>     $ alsactl store -f gsmhandset-test1.txt
> Now you can diff this new file against the original
> (/usr/share/openmoko/scenarios/gsmhandset.state) and see which settings
> were changed. To make your changes persist for future calls just copy new
> file (gmshandset-test1.txt) to
> /usr/share/openmoko/scenarios/gsmhandset.state. To the best of my
> knowledge you don't need a reboot.
> --Andrew

Can you add this to the wiki? will be helpfull to a number of other people.

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