Rustling noise on phonecalls

[Ben Wong]

Mickey: Please set the default volume back down.  I just confirmed (by
talking to a human) that when the Speaker Volume is set to 100%, the
other party hears an annoying echo of their own voice.

Thank you,

--Ben

P.S. I don't know if it matters, but I'm using a Revision A06
Freerunner, buzz-fixed.



On Wed, Jul 8, 2009 at 9:54 PM, Ben Wong<lists.openmoko.org at wongs.net> wrote:
> Mickey: It seems a very bad idea to default to maximum volume if it
> causes distortion.  I'm not sure yet that that's the sole audio
> problem in SHR-unstable, but I can say that when I turned the speaker
> volume down to what it was in SHR-testing (68%), I was understood
> perfectly, for the first time, by Google's voice recognition
> (1-800-GOOG-411).
>
> For anyone wondering how to use D-Bus to set the volume to 68%, you
> can do it by cutting and pasting this line:
>
>  mdbus -s org.freesmartphone.ogsmd /org/freesmartphone/GSM/Device
> org.freesmartphone.GSM.Device.SetSpeakerVolume 68
>
> And this line will show you the current volume:
>
>  mdbus -s org.freesmartphone.ogsmd /org/freesmartphone/GSM/Device
> org.freesmartphone.GSM.Device.GetSpeakerVolume
>
> Please experiment with different values by changing the volume during
> a call.  I'm interested to know what values work the best for you all.
>  And does 100% actually work for anybody without distortion?
>
> --Ben
>
>
> On Tue, Jul 7, 2009 at 10:38 PM, Michael 'Mickey'
> Lauer<mickey at vanille-media.de> wrote:
>> FWIW, against my personal experience (where this setting lead to
>> suboptimal results), people have forced me to uplevel the speaker volume
>> in the phone to the maximum in ogsmd. It's very possible that this
>> contributes to the distortion. Try lowering it, e.g. via
>> org.freesmartphone.GSM.Device.SetSpeakerVolume( percentage ).
>>
>> :M:
>>
>>
>>
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>